I just got the base 2010 MBA and am a little confused. I thought the RAM was not upgradeable, but when I re-read the specs at both the Apple Refurb site as well as Best Buy's site, it says a max of 4GB for this model. How is that possible? Do you have to take it to an Apple Store and have a Genius do it? http://store.apple.com/us/product/FC503LL/A?mco=MjA2NTk3NzI Memory 2GB of 1066MHz DDR3 SDRAM onboard (4GB maximum) http://www.bestbuy.com/site/Apple&#...bolsp-app06-45?id=1218200061236&skuId=9944942 2GB DDR3 SDRAM For multitasking power, expandable to 4GB.