I think before I get an Air, I definitely need to improve my social life and/or my coffee intake. Right now, I don't have a personal need for an ultraportable. I switch desks (home, office, abroad), but for that scenario, my current MBP 17" is a pretty ideal solution. Considering that I have (or could have) external monitors at each desk, the Mac Mini probably sounds like a better solution than the MB Air.

If I ever have to attend a lot of meetings/conferences/presentations or finally find the time and money to travel the world, this looks pretty neat. Gives the Thinkpad X Series a run for its money.