Yeah, I'm really not sure what to make of the battery, honestly.
Mine is scheduled to be delivered tomorrow (it's already at my local fedex facility, they just don't want to deliver it until tomorrow) so I dropped by a Verizon store today to check out the accessories. Unfortunately, they didn't have any of the batteries or covers for me to take a look. Pictures are one thing, but as far as I can tell, they show a very distorted picture and I really need to see this for myself somehow.
That said, for the moment I don't want to have to mod anything and a case I feel is required, so I'm stuck with the 1300 or 1500 batteries until someone comes out with accessories (or, hell, mods a couple dozen and sells them) before I look at the 2150/3500.