If you're JBen there's MiWi and a couple other apps but keep in mind they are paid apps so make sure it would work before trying it. I've never tried any of them although I would love to soon. I'll go on record here saying eventually Apple will bring it to the iPad. In iOS4 you have the ability to turn off 3G and Data and the iPad is not tied to a contract. They wont do it right now because carriers are milking users for money but the features just fit so well together. You turn data off on your phone and use your iPad in your bag as a hotspot for your phone.