I was at the apple store today asking this very question. I'm looking into the 11" Air to run fusion and Win 7 purely for my C programming. I figured a non intensive application like that would be fine on 4GB as the only other things I'll be using the MBA for are email, Internet, Microsoft Office, and iWork. I've realized I would benefit a lot more being able to do my coding homework out on the go between classes rather than waiting until I got home or after work at the last minute sometimes. I used to have an iPad to try and take notes but I really think the MBA is the way to go for me. Sold the iPad earlier this month.Sorry, I read my post above and was not clear. I have an I7 processor but it's definitely not needed to run Fusion. The MacBook Air can run fusion without issue; my MacBook air from two years ago ran it fine. The main thing is RAM; the more better, but that's always the case. My 2011 Air only had 4 GB and I made that work just fine with Fusion.