I had reflashed OS2007 while waiting for Wayfinder to be available. (I just bought the Navkit for N800... so I was waiting for Wayfinder to be available.)

After reading this thread... I thought it was available NOW. It is STILL not available.

If you try to activate using a Navicore 2007 serial number you will still get the "Navigation service is expected to be available in December 2007".