I'm helping a friend install an additional 512MB ram chip in his new iMac G4 17". The Apple specs say: PC2700 (333MHz) DDR SDRAM expandable to 1GB; one 184-pin DIMM and one open user-accessible SO-DIMM slot. Anyone have any tips where to get the best deal on this chip? Pricewatch.com? Some websites have it, but they don't list SO-DIMM. Is this user accessible chip the same 184-pin that everyone is selling? Thanks in advance.