This isn't so much news as it is a public service announcement: even in markets where iPhone tethering has launched, you've never been able to use it to connect to an iPad, and you won't be able to when AT&T flips the switch on tethering with the release of OS 4. That's clearly not AT&T's fault, it's Apple's -- the iPhone inexplicably supports only USB and Bluetooth for sharing its internet connection, even though jailbroken apps like MyWi prove that a WiFi connection is totally doable and countless other handsets already support WiFi routing. And iPad doesn't support using another device as a Bluetooth modem, eith
