Hi, I have searched for this on here and not found anything, so I've made a thread to ask. I have been reading info about the MacBook Air- not in a position to buy one right now, but it's a possibility. If so, I would sell my 21-month old MBP (which is being fixed atm due to broken superdrive and screen- screen was my fault) and buy a used MBA, probably from eBay. I keep reading that 'rev A' models have lots of problems and people shouldn't consider buying one of these. When I see specs listed, they say 1.6Ghz, 80Gb HDD etc- but I don't know how to tell from this what revision it would be. Melissa.