Correct - it has been possible to develop non-audio, non-HID Bluetooth products for the iPhone for over a year. However, until very recent releases of iOS (around 4.1 onwards), the iOS Bluetooth stack was too buggy to really be that usable for most such devices.
The main thing holding back the development of these products now is, as others have pointed out, the difficulty of buying Apple's authentication chip. In order to get hold of these, you first need to prove to Apple that you are a serious volume producer. However, other devices are beginning to appear, such as this universal remote control:
http://www.gear4.com/product/_/29/unityremote/
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Correct - it has been possible to develop non-audio, non-HID Bluetooth products for the iPhone for over a year. However, until very recent releases of iOS (around 4.1 onwards), the iOS Bluetooth stack was too buggy to really be that usable for most such devices. The main thing holding back the development of these products now is, as others have pointed out, the difficulty of buying Apple's authentication chip. In order to get hold of these, you first need to prove to Apple that you are a serious volume producer. However, other devices are beginning to appear, such as this universal remote control: http://www.gear4.com/product/_/29/unityremote/