I've already been testing a handset that lets me hop on an 802.11b network... Only thing it's missing is a web interface to permit me to click the "I Agree" button on some captive portals, and I've been told its "in the next release" (snicker). It's decent, but still B. I'm looking forward to the G version I can give my boss instead of his desk phone (since he's prone to wandering the office instead of sitting in a chair).
I'd be curious to see how this does with consumers, though I think most of us are going to opt for a headset and softphone while at Starbucks, if we even bother using VoIP on a shared connection like that. ;-)
Besides, with mobile carriers like MetroPCS (South FL and some of NC) offering no-limit use for $40, and carriers like Nextel offering unlimited incoming calls for $59, why would I wander around looking for a hotspot? I don't like coffee shops *that* much.