Yeah that's the great thing about the air, the SSD. I tried one, and thought - holy cow! mine is so slow in comparison.... yet my hardware is waay better (excluding my HDD vs SSD of course) The SSD just makes the responsiveness that much better.
BTW what are the upgrade options if you have a macbook?
I know they're said to have good resell value, but who'd want to buy it now that the quad core ones are out?
I got my macbook pro after the mid 2009 refresh, so it has SD card reader etc... but I would like at least 4GB more ram (total 8GB), and also an SSD in it... 256 or 512

even ... What would you recommend? I really can't afford the apple premium prices just for a hardware upgrade.