Tyler Larson shows up at a ruby meeting every once in a while. He works mainly in flash but has been doing ruby stuff for a little while. You can see some of his stuff here…
http://motionandcolor.com
http://tyleralanlarson.com
and here are some ruby sites he helped with.
http://moderntonic.com
http://kidoscomputer.com
http://aboutdrawing.org
http://explorernews.com
and he has a cool open source project here (not ruby)
http://code.google.com/p/htmlwrapper/