As of this moment, the Nokia Repair Status page says:
Repair in Progress

However, Nokia sent me a replacement unit which just arrived with no warning.

I would have been much happier two days ago, if they had bothered to let me know it had been shipped.

Better communication would be nice.

A web page which says "Repair in Progress" does nothing for me, since it isn't really the truth.

I am happy to have the 770 back without any excessive delay.