Please critique my project. Is it a waste of the domain name?

i don't really see how it's much different than just using twitter.com's search for "ruby" and seeing a bunch of results, aside from your affiliate links on the right.

perhaps add some kind of trending so one doesn't have to sift through pages and pages of results to see what's new/popular?

i think a more generic domain name would be better so that you could just use subdomains to affect the search. ruby.yourdomain, php.yourdomain, etc.

If you find a way to analyze those Ruby tweets and separate them out automatically into categories and also minimize duplicated content, it could be rather useful.