Apple has just released iPhone OS 4.0 beta 4 to the developers, and one of its more noteworthy features, at least as far as AT&T subscribers are concerned, is the inclusion of internet tethering.

iPhone OS 4.0 beta 4 AT&T Internet Tethering

This screenshot is proof that the upcoming iPhone OS 4.0 finally comes loaded with proper network settings to enable internet tethering on AT&T. However, before you pop the champagne and start celebrating, you should know that AT&T already went on the record a few weeks ago saying that they’re “still waiting on better network performance” before allowing their subscribers to take advantage of this feature.

For skeptics out there, here’s a video confirming AT&T internet tethering on the latest iPhone OS 4.0 beta release:

We’re not sure what other new treats iPhone OS 4.0 beta 4 comes with, but in the past, we've seen a new media player widget complete with orientation lock button as well as references to an iChat feature though this has yet to become an actual part of the system.

Anyway, with WWDC 2010 just a couple of weeks away, we'll probably get the full rundown of new features iPhone OS 4.0 brings to the table once the conference begins on June 7 where Apple might also unveil the 4G iPhone.