I believe the MacBook Air 80GB HDD comes straight from the iPod Classic. So up until now, I don't think it's been possible to upgrade the MBA since the 160GB drive was a bit thicker than the 80GB. Well now since the iPod classic 120GB is the same exact size as the 80GB classic, that leads me to believe the new 120GB drive is the same size as the 80GB. Which if that's the case and someone can verify that, I'd swap out the drives in a heartbeat. I'd definitely post a tutorial with pics too.