I tried doing a search for the obvious terms, so if there's already a thread for this, fuck you anyway.
Let us know where you're going (aside from festivals, which all pretty much have their own threads), and maybe people can provide advice on things to do, sites to see, etc, plan meet ups, provide places to crash, guide you towards good cheap restaurants/bars. Or tell us about where you just went and how awesome/horrible it was. Post pictures.
I'm heading to Chicago this weekend (probably Thurs 3/26-Sun 3/29). I'm crashing with a good friend who lives there, and I've been there twice before, so I'm sure I won't have too much problem filling up time, but is there anything cool I should make sure to check out?