uscan watch-file pattern for RubyForge?

[Mike Williams]

Has anyone managed to craft a debian/watch file that successfully 
monitors RubyForge for updates?  Looks to me like they include a 
generated three-digit number in the URL, which makes it tricky.  e.g.

http://rubyforge.org/frs/download.php/551/RMagick-1.5.0.tar.gz
--
cheers, MikeW                            http://www.dogbiscuit.org/mdub/