Used iBurn last year, super useful. Sad. But relatedly, this site http://burnermap.com is pretty awesome; it lets you figure out what camp your friends are staying at on the playa. (They should have a lot of the camp geodata that iBurn needs, too, there's like 10K Burners who've FB connected.)
Separately, for finding/offering rides to Burning Man, a few of us have been working on http://burningmanrides.com, so if you've got feedback, let me know! email in profile.
On a related note, anyone have any advice on how to tell your new employer that you're taking off for burning man? I ...uh...have a friend...