I've been tethering my laptop and other peoples laptops over a 3G connection for a while now using my bright and shiny Nokia E71 smartphone and an AT&T 3G data plan by running JoikuSpot as many readers know. Others have picked up on the capability and are doing it now, eliminating the need for a Data Card and an extra plan.
Now comes word that Apple is considering or may actually be lobbying AT&T to allow that capability over the iPhone. Ironically, this may be the first time Apple has ever lagged (or followed) in the area of wireless connectivity. If you look at their history with the Macintosh, Apple was first with WiFi and onboard Bluetooth connectivity.