I currently use a home brew desktop, a thinkpad T23 and a IPAQ 5555.  I just got the T23 to work fine with the IPAQ, then I tried to update my main PC (desktop) with the IPAQ, the software never asked what I wanted to do, it just removed several titles from the IPAQ, I thought that there should be an intermeadiate screen to ask what you wanted done.  There appears to be no options, just the sync mobile device, bug?