I recently called Apple about adding more RAM to my latest revision 12" PB (the one right before they got rid of it), and to make it even 768 the price they gave me was over 125 dollars. I instantly knew that was rediculous, so I'm just going to order from Crucial and do it myself. Can anyone give me a link to the RAM I need on Crucial's site? (a stick of 512) Side-note: It has two 256's in it, one on the board, one is in a slot that is removable, right? So I can just take out the in the slot and put in the 512?