Following up on last night' release of iPhone 3.1 Beta 2 firmware and SDK, developers are finding more changes and new features.

  • TUAW reports that the AT&T IPCC hack, where the carrier file was modified to allow iPhone tethering sans official AT&T sanction no longer works. Bummer, given AT&T still hasn't announced anything about legitimate tethering support or pricing.

  • Engadget Mobile's been informed that new APIs have been introduced allowing for the manipulation of live video to produce "augmented reality" apps (where information is layered on top of the video).

  • Ars Technica reports iPhone 3.1 Beta 2 allows developers to connect to test devices via Wi-Fi, rather than having to tether via USB as in previous releases, and still access instruments and other features.