So after doing my research I've come to the following conclusions if you own an Iphone through ATT 1) IOS 4.3 has hotspot. 2) ATT offers tethering for $20 more a month, that adds the same 2G of data you get with the 3G plan for $5 less a month. 3) you can switch back and forth as often as you like in a billing cycle if you don't plan on using it much, or make the switch forever if you prefer. 3) If you don't need the extra 2G of data you can jailbreak and use MYWI for 19.99 and share your 2G with your Ipad. 4) the 3G ipad regardless of size costs you $129 more and another $5/month for the same amount of tethered data. Aside from the assisted GPS, and drain on battery life, why would anyone with an att Iphone buy a 3G Ipad?