I just get my MBP 15" (don't you just love it? ) and I wonder what can I do with the express card slot. I don't use much of graphic or pro photo sw, mainly I use it to process big chunk of data with Mathematica4.0 (best software ever to math & physis & statistics) so I have a slot which seems useless, can somebody help me? what is the best option to use it? thank a lot!