I went to the AT&T store tonight and snagged an Option GT Ultra Express mobile broadband card.  Thad had used one of these recent while traveling and since I'm not always near free WiFi access and will be doing a bit of traveling this summer I decided to go ahead and get one.

So far the installation process has not gone smoothly at all.  First off, the package from AT&T doesn't come with any software.  I actually had to go to the AT&T website in order to download the software for OSX Leopard.

After downloading the "Globetrotter Connect" software I had a number of issues getting the device actually configured.  Apparently I actually needed to enter my 3G/GPRS details in order to get the card to connect.  It would have been nice if AT&T provided this information