I recently got a new 2007 Intel Mac, which I have yet to review, but which I already updated. Apple has a reputation for gouging customers on extra memory configurations, (much like every other computer maker), and even though Apple now sells their computers with at least 1GB of RAM, this proves to be insufficient for Mac OS X 10.5 at least. However with today’s memory prices, you can easily find a good deal on DDR2 667MHz SO-DIMMS. The best deal I found was from NewEgg: 2GB Transcend DDR2 667MHz SO-DIMM for $36.99. When purchased there was also a $10 Mail-In Rebate that cut the price to $26.99, (with $4.99 extra for shipping). The aluminum Intel iMacs can handle up to 4GB of RAM, so if you do not mind throwing away the original 1GB DIMM, you can max out your iMac for less than $80.