MyWi on JB iPhone works with iPad.
Then I don't see why the iPhone wouldn't work. Hmm...
Of course it works. I used mywi all day with it launch day as i wasn't home.
The problem of course is...using too much of it. And being able to jailbreak 4.0 to have it. So yes, it works if you can jailbreak your iphone.
Zero, I'm running mywi on 3.0, works great. Though, I had to install it twice because it kept crashing upon bootup the first time around.
MyWi works great with the iPad!! The dev for that app is going to be making some serious coin now with the emergence of every new iPad owner wanting to thether they're iPhone if of course it's jailbroken.