When Apple first released the iPad, they only offered a WiFi enabled version. This would make your iPad similar to an iPod Touch. If you are one of the impatient Apple fans who couldn't wait til 3G, check out this tutorial.
All hope is not lost for using iPad on the go! In this video, you will learn how to use your jailbroken iPhone as a mini modem so you can use your WiFi only iPad on AT&T's 3G network. Enjoy!