There's been several requests for this, but it requires that we
need to extend Gem::Specification to accept metadata, but this is
no easy task :( Hop on #rubygems on IRC sometime and ask jbarnette
or drbrain about it! Definitely peruse that code in RubyGems
proper, we're open to submissions if you can nail a good
Closing this one, feel free to continue future development
discussion on the Gemcutter mailing list.