Interesting Scott. I can see that you've thought about this!
I wasn't aware that they were working on OS6. I'm actually kind of scared of sticks that are more expensive than the handheld themselves.
Using my cell to go wireless has also been something that I haven't been all jazzed up to do, which is partially why wifi seems like a better solution. As you point out, if you're in a place with a consistent hotspot, and one that isn't subject to dip-outs, that's a bonus.
Without a tech-centric office environment though, most of us are subjected to shelling out at airports or Starbucks...at least for the time being.