As part of our continued efforts to give customers early access to our technology - we have just made available the Activesync 4.2 Beta Preview.

It supports devices from Pocket PC 2002 all the way through to the latest Windows Mobile 5.0 devices

The Beta includes a number of fixes as well as a USB Troubleshooter for connecting your device to your PC:

http://www.microsoft.com/windowsmobile/downloads/activesync42.mspx