You can't tether the iPhone to an iPad
After the uproar of AT&T getting rid of the no-contract iPad 3G plans - consumers have now gotten another smack to the face. You will need to get a crappy new 3G plan for your iPad because you cannot tether the iPhone to the iPad. So, for those of you thinking you could skip the whole 3G iPad thing and just use your iPhone’s data plan to surf the web on your iPad, you’re out of luck.
As for the new iPad plans, if you buy an iPad 3G and get a data plan before June 7th, you will still get the $30/mo unlimited data plan, but you have to do it before June 7th (Monday). As for the tethering issue, this is a huge setback for lots of customers, and we have once again been ripped off by the AT&T/Apple super team (well, mostly AT&T).