Populate Mura extended attribute select list with Mura feeds

muraExtendedAttributeFeedList.cfm

<!--- Add to site Content Renderer --->
<cffunction name="feedList">
        <cfargument name="columnName" type="string" required="Yes">
        <cfargument name="delimiter" type="string" default=",">

        <cfset var q = application.feedManager.getFeeds(siteId = $.event('siteId'),type='Local')>
        <cfreturn arrayToList(q[arguments.columnName].toArray(), arguments.delimiter)>
    </cffunction>

<!--- Add to config.xml.cfm --->

 <attribute
                    name="compCollectionID"
                    label="Collection (optional)"
                    hint="Choose a Content Collection you'd like to have this component list"
                    type="SelectBox"
                    required="false"
                    defaultValue="none"
                    optionList="none^[mura]event.getContentRenderer().feedList('feedId','^')[/mura]"
                    optionLabelList="none^[mura]event.getContentRenderer().feedList('name','^')[/mura]" />

<!--- Or just create an extended attribute manually what is a select box with : ---> 
"none^[mura]event.getContentRenderer().feedList('feedId','^')[/mura]" for the option list and
"none^[mura]event.getContentRenderer().feedList('name','^')[/mura]" for the option label list

Thank you, I had just sat down to write exactly the same thing!