I’ve moved all of my Rails plugins (context, hotkey, param_types, and rtex) over to RubyForge.
To get them, use:
svn co svn://rubyforge.org/var/svn/<plugin>/trunk <plugin>
Where <plugin> is the the plugin name. I’ll be uploading the docs to the respective project websites here shortly.
Update 2008-03-09: You can get the Hotkey plugin at http://github.com/bruce/hotkey; feel free to fork it and send me pull requests :-)