I'm having an issue that is driving me crazy.  For some reason, my Samsung Blackjack is unable to sync w/ Windows Mobile Device Center for Vista.  I have five machines that are all recognizing the phone as:

SAMSUNG USB Composite Device
SAMSUNG CDMA Modem
SAMSUNG CDMA Modem Diagnostic Serial
Port (WDM) (COM#)

They should be recognizing it as an RNDIS Network Adapter which will enable WMDC to connect.

I've checked the Settings|USB Settings and even the underlying registry, hard-wiped the phone (hold up arrow and power up) and nothing is working.  After spending two hours on the phone with Cingular and Samsung Level 2 technicians, they told me (nicely) that they'll have to get me to Level 3 which is open Mon-Fri 9am-5pm when I'm working.  Has anyone else run into this issue?  Bueller?  Anyone?