OSCONMay 6, 2005
Registration for this year's Open Source Convention is now open! O'Reilly has released all of the conference details, include keynotes, sessions (including PHP, Linux and Security tracks) and pricing. The conferences offers an incredible 40% discount to non-profits!
Very few conferences are worth the cost of airfare, hotel, food and registration (which is why we are so blessed to have SXSW a mere three hours away), but if you're in the northwest and immersed in open source development, definitely check out OSCON.
The conference is in Portland, August 1-5.