I'm curious also... it sounds from the description like it might not be that simple, and perhaps there's a change on the AT&T side also. But it would certainly be nice.
Also it looks like I'll probably get AT&T hotspot access as part of my DSL package deal at my next home, in addition to the T-Mobile hotspot access I have as part of my cell phone coverage, so one way or another, I'd like it if I could use it.