Each day there seem to be more announcements on the official Summerfest.com site. The Harley Davidson Stage, the Potawatomi stage, the Briggs & Stratton stage and the M&I Rock stage all have announced their headliners. There seem to be some nice additions. Earth, Wind and Fire singing "September" would be worth a trip to Summerfest on the last night. The song always end every wedding reception I am at, why not close out the 2008 fest?
In case you didn't know, Summerfest is open each day, June 26 - July 6, from noon until midnight. They usually have a "kids" day at the grounds, with some taking this way too long in to the night.
If you are looking to kill some time online, check out the Summerfest Blogs at http://summerfest.com/cs/. In my one quick look, I learned the Foo Fighters are playing the Harley Davidson Anniversary party. I like me some Dave G.