i'm sure this has been asked before but i couldn't find it in the first few pages of the messege board. what does the 0.2 ghz difference mean to a consumer who is only looking to use the mba for internet, documents, store a lot of photos in iphoto, and occasional uses in idvd? I'm guessing that there's really not much diffence, but i just wanted to check with the experts in here if it was worth spending the extra $300. thanks a lot!