Hey all, My brother is in Afghanistan and he has told me he wants to buy a macbook air (REV B) (Well i'll be buying it since I'm not sure if Apple stores exist in the middle east).Him and I shared a macbook pro (2.53GHz unibody model) and he/and I were curious to performance comparison of the two units. Besides the obvious no super-drive, and fewer ports how big of a speed difference will there be? Major uses he does is internet browsing/chatting, watching movies, iPhone/iPod. Thanks!!