I just picked up an Intel X25-M 160GB drive from NewEgg. I have been using a rev b Macbook Air SDD which I thought was extremely fast....that is until I paired the Intel Drive with a brand new MBP 2.66. Ummm...wow. Its really fast. When the screen comes up after boot everything is already loaded and ready. With the Air SSD it takes about 2 seconds from the time you first see your wallpaper till you are ready to go. The Intel drive is instantaneous. Even though its still widely expensive I am convinced that an SSD upgrade is the single best thing you can do for your computer.