Well I am going to purchase one or the other in December. Went and played with both yesterday. 1.83 SSD Mac Book Air 500GB Time Capsule Super Drive $2,857.70 Ohio Sales tax and Education discount. I work for a College. MacBook, 13-inch, Aluminum 2.4GHz Intel Core 2 Duo 4GB 1066MHz DDR3 SDRAM 250GB Serial ATA Drive @ 5400 rpm SuperDrive 8x (DVD±R DL/DVD±RW/CD-RW) Backlit Keyboard (English) / User's Guide Accessory kit 500GB Time Capsule 2042.13 with Ohio Sales Tax and Education Discount. I work for a College. Roughly $800 difference. I love the Air's light weight! And it is more than fast enough for what I need. (MobileMe, syncing iPhones and My AppleTV, Web surfing, paying bills Photoshoping pics of the family and friends) Although for 800 less I get a faster clock speed, a larger HD, double the ram, and I really like the screen on the MacBook. But when I pick up the MacBook it feels twice as heavy as the Air even though I know it is only 1.5lbs. Arg! What would you do? Is the 800 worth the less power but light weight of the Air? The only thing I would like to do is run Bootcamp and WinXP also and I am questioning the HD Space on the Air. My wife does some things for her work at a nearby Hospital on the web and you must have a Windows OS to do them. I have less than 20GB of music and Photos, but will have a Time Capsule anyway. Will the SSD be Ok with Both OS on it and my 20GB of Media? Program wise will be Office 2008 Mac, and Photoshop. Maybe StarPlayer for Sirius.