I augmented my laptop's memory with another 512MB for a total phys mem of 992MB. Now I don't totally freeze up when I go by the bank in IF or Org playing WoW. :) I can't believe the recommended system requirements list only 512MB (and 256MB minimum... WTF?) It's a much richer game experience when the mountains and other high details are visible.
The extra memory also helps with WMP and photoediting software. :)