I picked up one of these recently. It has built-in Bluetooth, though I can't tell which stack it uses.
(Control Panel only has "Bluetooth Properties" which just lets you pair devices.
) I'm wondering if A2DP can be enabled on this device. Bta2dp.dll is absent from ROM, but I've heard of A2DP hacks for Windows Mobile devices where the required files are added. Anyone here know anything about this?