Summer reading group ideas and guides can be found here.
Ms. Magazine gets into the act too. How about Steamy Summer Reads from Richmond.com?
Hot summer reads in Audiobooks can be found here.
UC Berkeley's faculty and students have their own recommendations to make (from last year, but the books are old anyway).
It's apparent there's no shortage of recommendations out there. Do you pick up books from lists, or do you decide based on cover copy or store positioning? Or a combination of factors? Last year, I picked up Julie Kenner's Carpe Demon based on a) the cover, b) its position on a table at the front of the store, c) the kickass blurb, and d) vaguely remembered hearing about it elsewhere. (It was a great read, btw.)