Called Seidio CS and asked if any accessories for the G2 are available.. rep informed me that not at the moment, not in the works but needs public input. so please.. if you are interested in Seidio accessories shoot them a quick email.
Been down that road before of the humpback with smartphones. Since my G2's battery conditioned pretty damn well (rivaling previous Blackberrys), I'm glad to remain humpback-free. LOL!
I got the one from Mugen - aside from a really long ship time (not their fault, customs was atrocious) it definitely added hours to my use time. And it doesn't have the humpback. All good so far.