I've had these on nearlly every laptop I've owned, and I find them to be probably the most pointless extras ever. Sure, back in 2001, you could buy a wireless express card adaptor since your current laptop doesn't have 802.11g or something but this is 2009 and I have never ever used the express card slot other than fiddle with it with my pinky. Why doesn't Apple simply say this technology is obsolete and replace it with 2x USB slots or 1 usb and 1 firewire 400 slot? I'm sure more people will find it useful to have 1firewire 800, 3 usbs and 1 firewire 400 on their laptop rather than an express card slot. Also, since the express card part is gone, that space can be better used for more cells in your battery or better overall cooling for the laptop. So why is express card to important these days?