FOSS4G 2011 in Denver last September was such a good time, we're going to do it all over again at FOSS4G North America 2012!
It will be interesting to see who and how many attend. Some conference budgets might have been blown last year - but note that this event is cleverly timed to fall into a new fiscal! And being in D.C. there should be lots of suits and spooks in attendance.
I'm definitely looking forward to building on the momentum from the last conference, especially given my new gig with OpenGeo (ok, I'm definitely not booth-babe material - but being a booth-geek is probably more fun).