gistfile1.rb

Plugin.create(:view_on_web) do
  command(:view_on_web,
          name: 'View on Web Twitter',
          condition: Plugin::Command[:HasMessage],
	  icon: Skin.get("forward.png"),
          visible: true,
          role: :timeline) do |m|
    m.messages.map do |msg|
      Gtk::openurl("http://twitter.com/#{msg.message.user.idname}/status/#{msg.message[:id]}")
    end
  end
end