We're not exactly sure how this message got so confused, but Microsoft's come out today to let us know that Windows Phone 7 officially doesn't support tethering at all, despite earlier comments by Brandon Watson that it'd be a network operator call on whether to enable it. If we had to guess, this is probably a feature that was "on the bubble" as Microsoft moved toward RTM, and it simply didn't make the cut for version 1.0 -- we'd definitely expect to see it in a future release, though there's no guidance from Microsoft at the moment on whether (or when) that'll happen.

Boxee Box on display at FCC, inside and out