http://rubyconf.org/
The tenth RubyConf has been announced. It'll be in New Orleans, LA between November 11-13, 2010. You can't register yet, but there's a button to book a room at the official hotel.
Considering how quickly RubyConf sometimes sells out, it's worthwhile following @rubyconf on Twitter to be sure to catch when registration opens in case I don't let you know quickly enough..!