During the rebuild of my Dev Environment with SP2010 (the RC version) I was unable to get the Profile Sync service to work with the local domain. “Starting” was all it did until if finally un-provisioned itself to Stopped.
After lots if fiddling and rebuilding I tried something different. The SP2010 RC prerequisite installation installs the infamous WCF hotfix, but now I installed the “Windows6.1-KB976462-x64.msu” before hand, and now the Profile Import Service will start!
It could also very well be that I now did a REBOOT between the prerequisites and the SP2010 installation.