Stack Overflow DevDays 2011 has been canceled, due to poor attendance.
According to this blog post, this year's DevDays have been cancled due to poor attendance.
Stack Overflow DevDays 2011 is a series of conferences now in the planning stages (as of April, 2011) which will probably be held in the early fall. Each conference may be one day or two, and will almost certainly be held in at least 3 cities for easy access. This year we are planning a community-driven curriculum so you decide the topics and choose the speakers. Generally, the idea is that most topics should be intensive introductions to cool new programming technologies that everybody wants to learn next but nobody gets a chance to learn on the job. We always try to make the conferences as cheap as possible to encourage everyone to show up.