I have just updated A2DP Enabler, an application which enabled A2DP profile on original iPhone 2G. he primary goal for this update is to disable it for non iPhone 2G devices.
The update is also resolves a problem with "paired devices" list which sometimes doesn't populated properly. The update is optional, if A2DP works properly on your device you do not need to update but shouldn't hurt at the same time :)
Requires original iPhone 2G with iPhone OS 3.0 or higher. It doesn't work on 2.2.1 firmware and never will be.
A2DP Enabler can be downloaded from apt.dmytro.me repository