....thanks to the nice folks at http://www.koders.com/.  

For example, if you go the to RMagick SCM page here:

http://rubyforge.org/scm/?group_id=12

there's a little textbox into which you can type "jpg" or whatever, and
then when you click "go" it'll open a new browser window to the koders
site with the search results.  Like this:

http://www.koders.com/?rid=YNH5PQ5U24EG5EE62GRPAUYRGB&pname=rmagick&s=jpg&btnSearch=Go

Good times,

Yours,

Tom