Hey guys - about to buy an MBA. After 10 years in the "real world" i'm going back to school to get my JD and i want to buy a new laptop. I am leaning towards the 13" just because of my aging eyes and because of the added battery life. i am also thinking about buying a time capsule and i was wondering if those of you with MBAs and time capsule notice the slowdown? i have a 4 year old MBP that has a 2.4ghz chip and 4 gigs of ram. the time machine kicking in isn't too distracting, but sometimes i find myself disabling it while i'm doing lots of work and plugging it back in when i walk away - i know that's the exact opposite of what it's designed to do, but never the less that's what i do. Do you guys notice slowdown w/ time capsule? if so that might be reason enough to pop it up to 8gig IMO. what do you think?