It would be pretty easy to rework *any* 6700 AKU3.x release from UTStarCom to work with the Sprint-branded one - heck we're doing that now with wideawake's groundbreaking work on 2.2 and now all the 3.3 customs we're getting from folks.
So no worries. If they ever do roll one out we can use it. My guess is, once we get our teeth cut on Helmi's 3.3, we can just tag along with the great work the xda folks are doing on 3.5 in the Rom Kitchen, and get that working.
I'm not worried about running an unofficial rom - my gut feel is it's actually better then running the UTStarcom version
