Example of using the p2-maven-plugin to create a p2 repo with source bundles from maven central or any maven repository.

p2-example

<?xml version="1.0" encoding="UTF-8"?>

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.github.kingargyle</groupId>
  <artifactId>p2-orbit-repo-example</artifactId>
  <version>1.0.0</version>
  <packaging>pom</packaging>

 <build>
   <plugins>
     <plugin>
        <groupId>org.reficio</groupId>
        <artifactId>p2-maven-plugin</artifactId>
        <version>1.0.0</version>
        <executions>
           <execution>
              <id>default-cli</id>
              <phase>process-sources</phase>
              <goals>
                 <goal>site</goal>
              </goals>
              <configuration>
                 <artifacts>
                    <artifact>
                       <id>mysql:mysql-connector-java:jar:5.1.12</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>org.mongodb:mongo-java-driver:2.7.3</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>com.yahoo.platform.yui:yuicompressor:2.4.2</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>eu.medsea.mimeutil:mime-util:2.1.3</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>org.codehaus.groovy:groovy-all:1.8.0</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>org.eclipse.jetty.orbit:javax.el:2.1.0.v201105211819</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>javax.faces:jsf-api:1.2_12</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>javax.faces:jsf-impl:1.2_12</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>org.eclipse.jetty.orbit:javax.transaction:1.1.1.v201105210645</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>javax.ws.rs:jsr311-api:1.1.1</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>javax.xml.bind:jaxb-api:2.2</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>javax.xml:jaxp-api:1.4</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>net.java.dev.rome:rome:1.0.0</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>org.apache.activemq:activemq-core:5.6.0</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>org.apache.activemq:activemq-jaas:5.6.0</id>
                       <source>true</source>
                       <transitive>false</transitive>
                    </artifact>
                    <artifact>
                       <id>postgresql:postgresql:9.0-801.jdbc4</id>
                       <source>true</source>
                       <transitive>false</transitive>
                       <!-- <nouses>true</nouses> -->
                       <override>true</override>
                       <instructions>
                          <Bundle-SymbolicName>org.postgresql</Bundle-SymbolicName>
                          <Bundle-Version>9.0.801</Bundle-Version>
                       </instructions>
                    </artifact>
                 </artifacts>
              </configuration>
            </execution>
        </executions>
     </plugin>
     <plugin>
        <artifactId>maven-deploy-plugin</artifactId>
        <version>2.7</version>
        <configuration>
           <skip>true</skip>
        </configuration>
     </plugin>
   </plugins>
 </build>
 <repositories>
    <repository>
      <id>reficio-maven</id>
      <url>http://repo.reficio.org/maven/</url>
    </repository>
    <repository>
      <id>eclipse-maven</id>
      <url>http://maven.eclipse.org/nexus/content/repositories/testing/</url>
    </repository>
    <repository>
      <id>intalio-org</id>
      <url>http://www.intalio.org/public/maven2/</url>
    </repository>
    <repository> 
      <id>ettrema-repo</id> 
      <url>http://opensource.kantega.no/nexus/content/groups/public/</url> 
    </repository> 
    <repository> 
      <id>objectweb</id> 
      <url>http://repository.ow2.org/nexus/content/groups/public/</url> 
    </repository>
    <repository> 
      <id>semweb4j</id> 
      <url>http://semweb4j.org/repo/</url> 
    </repository>
    <repository>
      <id>tmate</id>
      <url>http://maven.tmatesoft.com/content/repositories/releases/</url>
    </repository>
    <repository>
      <id>openhealth</id>
      <url>http://repo.openehealth.org/maven2/releases/</url>
    </repository>
 </repositories>
  <pluginRepositories>
    <pluginRepository>
      <id>intalio-nexus</id>
      <url>http://repo.reficio.org/maven/</url>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
    </pluginRepository>
  </pluginRepositories>
</project>

Missing a line, Dave.

[ERROR]   The project  (/home/nboldt/tmp/kingargyle_p2-example_pom.xml) has 1 error
[ERROR]     Non-parseable POM /home/nboldt/tmp/kingargyle_p2-example_pom.xml: end tag name </configuration> must match start tag name <artifacts> from line 24 (position: TEXT seen ...</artifact>\n              </configuration>... @374:31)  @ line 374, column 31 -> [Help 2]

Also, 1.0.0.M3 no longer exists. Try 1.0.1-SNAPSHOT instead.

[ERROR] Failed to execute goal org.reficio:p2-maven-plugin:1.0.1-SNAPSHOT:site (default-cli) on project p2-orbit-repo-example: Execution default-cli of goal org.reficio:p2-maven-plugin:1.0.1-SNAPSHOT:site failed: org.sonatype.aether.resolution.ArtifactResolutionException: Could not find artifact org.beanshell:com.springsource.bsh:jar:2.0.0.b4 in jboss-public-repository-group (http://repository.jboss.org/nexus/content/groups/public/) -> [Help 1]

Did you mean this?

http://repo.maven.apache.org/maven2/org/beanshell/bsh/2.0b4/