The US has one. This isn't about 3G, this is about the emergence of 4G. The N810 WiMAX is basically a 4G device ... without a reasonably deployed 4G network to utilize. That's true whether you're talking about the US or Europe. The only decent deployment of WiMAX isn't even WiMAX, it's WiBro, in S. Korea.

The N810 WiMAX didn't fail because the US didn't have good enough 3G coverage, it failed because the WORLD wasn't ready for 4G, so a 4G device was incredibly premature. An N810 GSM/WCDMA device would probably have done a TON better (in the US and Europe) than the N810 WiMAX did.

The reason why this device will probably be OK is that a) it'll probably work just fine in Samsung's home country (S. Korea), and by the time it reaches the US, there will probably be a more solid WiMAX deployment to sell it into. And the WiMAX provider here will probably show it more love, since it's a WinMO device, as well.

The issue isn't "GSM vs WiMAX", and whether or not current investments are good enough. It's about the 4G protocol war (WiMAX vs LTE). The lack of adoption of WiMAX in the EU didn't happen because "we're good with WCDMA/UMTS". It happened because LTE became the direction everyone in the EU decided to go for the next generation. If everyone's deploying LTE for 4G, then WiMAX becomes a moot deployment.

(if there's one thing I give credit to the EU for, in this arena, it's that they're very consistent about this -- the US is rather schitzophrenic about it with EVDO and WCDMA, but 4G will be less so, with almost everyone going LTE over WiMAX).