Hi! I know they only say two GB, but let's say 4GB was possible, either on the current MBP or the new Merom ones. Can Mac OS X address all of the RAM? As if you max out the RAM on a Windows PC e.g. 4GB then only 3.1GB is addressable, as the rest is taken by PCI lanes and what not. With the new 64bit ones, surely it can address oodles of ram? Have I missed something. Never used a Mac before, so sorry if it is obvious. Plan to get a Merom Just wondering. 3GB would be VERY nice though anyway.