OK guys, calm down.
If you already have an iPad, you can get grandfathered in, and AT&T
Furthermore.. iPhone tethering has always been available.. it's called a jailbreak. It's not hard. Just google "spirit jailbreak" and in less than 10 minutes you'll have Cydia and can download the tethering app of your choice, whether AT&T likes it or not. Poof, iPhone tethering with unlimited data, no need to wait for Apple to release OS4 to the iPhone and then get put on a 2gb plan for the iPhone as well -- keep your iphone unlimited data forever if you want. 3