Great news for AT&T data users today, as the Option GT MAx 3.6 ExpressCard and the Sierra Wireless AirCard 875U USB card have just been made available. The 875U USB version is Mac compatible when you download the client from Sierra's Web page, and the Expresscard Mac drivers can be downloaded here as well.
Pricing? The ExpressCard will be $49.99 with a two-year, but the USB'ed 875 has no pricing yet (it launches in May). Happy surfing.