With this commit:
http://github.com/bretweinraub/meteor/commit/afbe47070024b4037d6b35a866a8d7f20256f973
If you do the following:
script/generate meteor_plugin_widget plugin_name widget_name1
widget_name2 ....
You will get all of the files and directories laid down that represent
adding widget_nameX to your plugin (if you've created the plugin
already).
Before once you'd created a meteor_plugin, there was no way to add a
widget to it except by hand.