Well that just sucks. I guess it looks like if I don't want to switch carriers then I'll be going to get a Windows Phone (and with Mango, I'll be pretty happy with that). Although, I'm still holding out hope that Apple releases a model compatible with T-Mobile 3G part way through the product cycle like they did with the Verizon iPhone 4.
Thank the damn corrupt FCC. They couldn't have just let T-Mobile use bands that the REST OF THE WORLD uses. Had T-Mobile had some normal 3G bands, they probably would have gotten it well before Verizon.