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Come this “summer”, iPhone 3.0 — see our walkthrough — will allow iPhone 3G (and perhaps next-generation iPhone users) to enjoy new Bluetooth functionality including stereo headsets, both the A2DP audio and ARCP control protocols. For consumers, the Motorola HT820 Stereo Bluetooth headset (available from our sibling store, WMExperts) may be an option you want to consider come release day. For developers testing using the A2DP/ARCP profiles on the iPhone 3.0 Beta, they might even be something you want to consider now.
Short story: GP Apps made iVidCam, a video recording app. Apple rejected it for using undocumented APIs. The developers appealed on the grounds that other camera-related apps also use undocumented APIs and demanded Apple allow it in, and let them sell it for 2 months before Apple released their own video recording functionality, as anticipated for WWDC 2009. Apple thanked them for pointing out other API violators, said they would investigate, and let the rejection stand.