OK, I should probably put it out there that I'm not unfamiliar with PC builds, having built more than my fair share of WinBoxes in my life. That being said: 1) Where would be the best place to get a 2GB DIMM for the 2.8 24-inch iMac (preferably in Toronto)? 2) Should I f!ck up and install the wrong kind of RAM, what's the worst that could happen? Will I void my warranty if I install something incorrectly, or use the wrong kind? I know these may sound like stupid questions, but it's not every day I drop $3k on a new toy, and with Apple's strict rules re. what you can and can not do with your own machine, I just feel better asking.