Ozomatli puts on a great live show and is famous for working their way out into the audience to jam during their encore. I was about 10 feet to the left of them during this moment from 3 years ago. Super fun times.
The Stern Grove 2009 line up. was just released today. The July 19th show with Sergent Garcia and the July 26th show with Lyrics Born look promising. I live for free outdoor parties during the summertime.