I've been completely happy with the 384 MB of RAM on my TiBook 500, but since I've almost switched over entirely to X I'm starting to see some slight limitations. I want to add more RAM but am not sure if I should jump for another 256 or wait it out and spend for the 512 chip. I want to know what u guys think (esp. if u have a TiBook and experience with the different vendors)? Size, vendor, etc... thanks in advance!