I wasn't expecting Coachella to be the fashion wash-out that Lollapalooza was for me in 2007, see pics here), but I was surprised how few people wore much more than shorts and a T. There were a LOT of barely there bikinis and your usual selection of festival freaks, plus a huge trend for wearing Native American feather head dresses, but all in all, not much to write home about on the fashion front. ADDENDUM: And, now that I've just clocked style.com's efforts on the Coachella front I'd say there was a fair amount of barrel scraping going on there.
Anyway, here is my edit of the most interesting style looks that I caught at Coachella 2009.