I finally managed to stream Audio from my Touchpad to my PC. Nice! I am using an Asus BT211 Bluetooth 2.1 EDR Adapter and it sounds pretty good for normal sounds and music. I am using the bluetooth stack provided with Windows 7 in combination with the lastest Asus software from their website. I had to pair my computer as an "other device", since my Touchpad was unable to find it as an Audio source. Then I could enable the A2DP streaming connection in windows 7.
Anoying issue: When watching videos on the touchpad the sound over bluetooth streaming is more than a second behind. If I connect the touchpad to my bluetooth headset there is no such problem. I hope this will still be solved in future updates.
I noticed earlier that the Touchpad cannot print on my Canon MX885 network printer. Unfortunately the Touchpad cannot print over bluetooth connected PCs either, although Windows 7 provides that function.