AT&T wireless network adapter?

[NRose8989]

I'm considering on getting a 3G network card for my MBP but I'm unsure on which is better? either the USB Connect 881 or the Option GT Ultra Express? I've heard that the Express card doesn't work with 10.5, is this true? i would prefer to have the express card though so i dont have to take up one of my USB ports. does either offer faster data rates? thanks in advance.

[SmartIndianKid]

As far as data rates go, the bottleneck will be the speed of AT&T's network, not the port you choose to use.

As for the 10.5 issue though, I can't comment seeing as I don't have 10.5.