We don't require that you know Ruby to join, but it's going to be a technical group, so it's probably only a good fit for actual or aspiring web application developers. That being said, if you want to code Ruby, all skill levels are welcome!
I plan to have the meetings weekly with bi-weekly "presentations" that are 30-45 min in length. These presentations will be walkthroughs of new tools, gems, workflows, patterns, etc. and will be a fairly deep dive into their specific topic. All members of the group are more than welcome to present (I certainly won't be giving all the talks!) and I will definitely be getting some other members from the Ruby community to give talks as well. The non-presentation nights will be hack nights where we can all get together and build something awesome together, or work on our own apps with friendly Rubyists around to help with questions, etc.
You don't have to be available every week to join, but I have from 6-10pm free nearly every Wednesday so I plan to dedicate that time to hacking Ruby. I'd love to have others join me :)