One of the things that I'm most excited to have as part of the 2007 MountainWest RubyConf is the second Alternative Ruby Implementors' Summit and Panel -- I wrote a bit more about it here:
The rest of the speakers and talks are listed here: http://mtnwestruby.org/speakers/
If you're interested in attending and can make it to Salt Lake City on March 16-1, please register at: http://www.acteva.com/booking.cfm?bevaid=126426