Hi, I'm a newbie, so bear with me. I just got a 15" PBG4/Combo three days ago. I have several questions that you might be able help with. 1) I'm new to the Mac world, but it seems like hardware is a bit more difficult to find. Are Apple hardware proprietary? Meaning, does it have to be OE? 2) I want to upgrade my memory soon. From the factory it comes with 256 I think (I didn't get the Superdrive). It feels like when I'm running Office apps and other stuff at the same it slows down quite a bit (especially during loading). Where can I go to get more memory? I want something that'll integrate seamlessly with my mac. Can you recommend? 3) I want to set up my wireless network soon. I need Aiport Extreme hub, the Extreme card (my model didn't have one installed), and what else? Can it be from another manufacturer? Any recommendations? Thanks a million!