Freeze Peach. Many were excellent. Brownbird Rudy Relic seriously rocked the house with the most bitchin' bluegrass I've ever heard. Plus, he donated all his proceeds from cds to the benefit. I've heard rumblings about him opening for the 11/6 event as well.
There's also a sweet little jazz trio that plays at the LIC Greenmarket. I don't even know their name.
Of course there's our own jazzy Josh Irving.
Photo Credit: Matt Mills (thanks!)