Hi all... my first post on here. Am waiting for the announcement on tuesday and am getting a new macbook. is there a large difference between the 2.1 and 2.4 as far as the speed of the computer? Basically i will be using for basic email/pics/internet/itunes etc. Is there a big difference between the 1GB and 2GB of ram in my case? is it possible to upgrade later? Does the size of the hard drive matter for what I will be using it for? (120/160/250) Clearly the figures can change based on the annoucement tuesday (I am hoping for a price drop as well) but would appreciate any help!