After failing to pair unlabeled and Targus mice, I purchased a Microsoft Bluetooth notebook mouse 5000 (69R-00001). This paired and connected on first try and had been working flawlessly. This seems to agree with other reports on BT mouse compatability. Acer's official response was that the A500 is not BT mouse compatible. Why the MS mouse works is an open question. Any ideas would be appreciated. I have a stock rom running 3.2.