> I can buy 128 MB dimm's in the shops for AU $100, so I am wondering > will normal dimm's work in the iMac, 192 MB Ram for half the price of > upgrading the computer to 128 MB through apple is definitely a good > thing as far as I can see.
Yes, new iMacs use standard PC100 DIMMs. There is one issue where the latest version of the firmware is more picky than other machines about RAM specifications. If your memory isn't exactly up to spec, then Apple machines with this latest firmware will silently disable it on boot. You can read about it at MacInTouch: http://www.macintouch.com/firmwareramprob.html