I'm looking to get a battery upgrade or replacement for my Santa Rosa Macbook. Preferably, I'd like something that's going to replace and greatly extend the life of my OEM Apple battery. Anyone have any suggestions as to where / what to buy? I've been doing some googlin' and I haven't really found anything of worth, and the E-bay batteries look really sketchy. *edit* No, I don't want to buy the battery from the Apple Store.