Some would argue that running on the ATT network isn't fully functional either.

Agreed.

Where'd you get it, and, if you don't mind saying, for how much? Anything I should watch out for?

Well, I mean, of course work is going on for the next phone. Given that they take quite a while to develop, you have to start on the next one well before you ship the one the world knows about.

And I'm not in PR, so Dan Lyons can't get all shouty with me

I got it at a T-Mobile store for $400. It's funny how hard it was to get them to allow me to hand them $400. But eventually, because a lower-level employee had already told me they would sell me the phone without a T-Mobile contract or account, the manager sold me the phone. I then used an online service to unlock it.

In the end, if I'd known about the developer phones, I would have gone that route. It ends up costing the same ($400 plus around $25-30 for unlocking or registering as a dev). Still, there wasn't really anything to worry about in getting the phone and unlocking it.

And to everyone else, clearly I realize that not having 3G means it's not fully functional, thus the ellipses. Sorry I did not follow the usual emoticon-based sarcasm conventions

But I must say, I rarely run across a case where lack of 3G is a hindrance. I've even been able to watch Youtube videos over EDGE. Web browsing, email, and even downloading apps all work fine, and more than half the time I'm near WiFi anyway.

Lack of 3G is a major issue for me because my carrier doesn't support EDGE in most areas. GPRS isn't fun!

Quite, EDGE is relatively rare in the UK, it only seems to appear a lot in very rural areas (where they won't be getting 3G for a long time).

I'm just confirming that lack of 3G is a side effect of AT&T, and not a side effect of unlocking and use on another network, right?

Eventually I want to use mine on O2 in the UK, I am hoping it will connect by 3G on that.

AT&T must have 3G, as it's the only provider for the 3G iPhone.

AT&T's 3G operates on 1900MHz and 850MHz. The G1 only supports 1700MHz (used by T-mobile in the US) and 2100MHz (used in non-US countries)

An iPhone 3G (at least the US version) only supports 3G on 850, 1900, and 2100MHz. Therefore, an unlocked iPhone 3G cannot use T-Mobile US 3G service.

Well, there you go.

The great thing about standards is that there are so many to choose from.