I figured it wasn't listed because its not technically out yet. The G1 does not pop up on some of the other searches, and says coming soon if it does pop up. I'll keep my fingers crossed! If it won't work, i am not buying it.
I'm 99% certain it doesn't. Here's why:
All the phones listed that work with the Wifi service have:
-A HotSpot @ Home or HotSpot Enabled logo next to the picture.
-Some mention in their specs about "WiFi & Mobile Calling"
The G1, however, just has a MyFaves Logo, and doesn't mention anything about WiFi @ Mobile Calling, in fact the only smartphones that mention it are blackberrys.
Additionally, while they've talked about MyFaves, and even show a MyFaves Icon on the screen, we have been told zero about this phone being a HotSpot @ Home phone in any of the marketing materials. HotSpot @Home is a service they are still trying to get people to do, so if they released another phone that supported it, why wouldn't they advertise that?
I have the G1, and nothing in the box or on the box says anything about hotspot @ home. I've been playing with it all day, there's no HotSpot Anything on this phone. To work with that service, the phone would have to have programing on it, the G1 does not.
From what I've read on this forum, and others, the T-Mobile reps were woefully undereducated and underprepared for this phone. SO I think the one you talked to was mistaken.
Sorry dude, unless they've really missed an important and very marketable way of introducing this phone, it doesn't do what you want. Sounds like you'd be better off with a BB, or getting one of those $400 cell phone repeater/amplifyers for your home. Best of luck.