I see that T-Mo has finally launched its UMA service nationwide in the US, just 17 months after announcing it. It has a huge range of 2 fairly basic [VGA camera?!] phones from Nokia & Samsung, although from one of the comments on Engadget suggests that other phones [Curve? and Pearl 2 - presumably a BlackBerry] are rumoured to be on the way.
Interestingly there's also a comment that Cincinnati Bell has also launched UMA, which appears indeed to be true - although the poster is rather less than effusive.