Wow, all I can say is the performance increases with 2GB are quite substantial. I really noticed the first 1GB I installed, along with the stock 256MB. I upgraded to 2GB today and OSX feels the same (Aperture is still a little jerky in full screen mode, is this because of the Macbook graphics card i wonder?). However, in parallels I've XP running with 1000MB of RAM and OSX using the rest, both OS's feel native. It's amazing. As for parallels, I noted that running via a bootcamp partition 'felt' much better than virtualization. Parallels is amazing software.
Next I might go for a 7200RPM MPR HD...
Next I might go for a 7200RPM MPR HD...