O’Reilly is publishing a book called GoogleHacks, which has 99+ interesting and productive things you can do with Google. The books is to be available from February 2003 but you can preorder if you want.
Oh BTW, did I tell you that I’ve started helping out Aaron Swartz in populating the Google Blog !! Yeah, it’s the best resource on anything google. Hey, why don’t you join in the fun too ? If you find anything interesting, mail it across to firstname.lastname@example.org .