I didn't get the stoner vibe from Natural Child at all... except for visually, maybe (the bass player did look an awful lot like a stoner friend of mine from high school), but their sound was just raw, sloppy garage rock'n'roll.
I thought Tyvek kicked ass live. Much better than their self-titled LP which I bought recently but didn't care much for (although I do include a song from it on my latest podcast).
Oblivians did sound a bit strange at the Granada. Just wasn't the best venue for them, but they still sounded great.
Check out some of my friend Tom's pics from the fest here:
http://www.flickr.com/photos/tomq/