So, having spent a lot on my new (yet to be delivered) refurb MacBook 1.83Ghz and its accessories (bag, router, nano etc.) I'm broke and left with no money for immediate RAM upgrade. So, being temporarily (or indefinitely) stuck with 512MB RAM, I'd like to know if (by not having 1.25/2GB RAM) the performance will be as bad as people have suggested it is. Will the computer really be incapacitated WITHOUT the upgrade? I mean, is it immediately imperative? Will there be constant freezing, slowing down when just playing iTunes and browsing etc. Surely there must be people who haven't yet upgraded RAM. Who hasn't and what's the performance like? Please console my empty pockets. Thanks a lot guys.