I'm having a hard time finding info about this, so maybe some users here have had better luck than me. Vista rc1 recognizes my x50v just fine and asks if I want to sync the items on the sd card... however, the sync center to give me the option to actually sync with Outlook (I've tried Outlook 2003 and Outlook 2007 b2) just will not open for me. Anyone had any luck? When I open the mobile device center it just says I'm connected... and that's it.

WMDC (Windows Mobile Device Center) is still not available for Vista. It is supposed to come available soon but nobody knows exactly when.
In the Vista Test forum questions have been asked but not answered.