comp.lang.ruby - join
The Ruby dynamic OO programming language.
High activity, 7345 subscribers, Usenet

ruby-talk-google - join
This is a mirror list of the offical ruby-talk mailing list. It serves as a alternative to the mail<->news gateway (comp.lang.ruby). It exists to provide access to the mailing list via the convenience of Google Groups web-based client.
High activity, 2488 members

Deploying Rails - join
Discussions related to deploying applications built with Ruby on Rails.
Low activity, 1281 members