What's New in the Newest iPhone 4 Beta: Is That Tethering I See?

iPhone OS 4.0, which will ship with the next version of Apple's iPhone (and, later, the iPad), has been available to developers in beta form for awhile now, in three consecutive versions. The newest, iPhone 4.0 Beta 4, just came out today, and it's got some new features we haven't seen before, as discovered by Gizmodo.

First is aesthetic--utilities like the calculator and compass are by default grouped into a "Utilities" folder on the homescreen, and there are a bunch of new wallpapers. Those...