Here's a strange one... this past weekend, I upgraded the hard drive in my friend's 1.33ghz 12" ibook for him... serious procedure, you have to take apart half the damn machine to do it. Anyway, while i was re-assembling the thing, i noticed something interesting... there appears to be a second RAM slot in there! If you remove the RAM from the top slot, and look at the socket, you can see that there is actually a second slot underneath it. Granted, the metal guides that hold the chip in place only allow for you to access the top slot, but does anyone know if that second, lower slot works? I was thinking, especially since I have a spare 512MB pc2700 chip here, would it be possible to put the 512 in one slot and a 1gb in the other, and with the 512 on the main board, take this machine to 2gb total? does anyone have any info on this additional, unmarked slot?