Day job: Student about to start last year of High School (13th grade)
Your Rails contributions (if any): No committed code, but I've helped out on a few bug reports, and I made a plugin.
What's your Ruby/Rail experience?: I've been programming in Ruby/Rails since 2008 (I remember Rails 1), and I've worked on a few (mostly personal) projects. I have two static sites up that are generated with Jekyll + some extra magic with a build script I wrote that eventually uploads to FTP, and I made an ActiveModel plugin for the Defensio spam filtering service, called Defender.
How do you use GitHub?: I use GitHub to host my code project, and it's the first place I search for the source code for projects. If I want, say, a Ruby LDAP library, the first place I search is GitHub. I haven't been able to get too involved in other open source projects, so I don't use the "social" features too much.