I just prepared a geocachingtour. I am using a Garmin GPS device and the OpenStreetMap maps. Even though my city is really complete (over 99% of the streets, pretty much ever pub is in ;-) I update the map every month or so. Spelling mistakes, the rural areas get better and better each day and so on.
Today I discovered that the map for Garmin devices is now routable! That means I have a navigation system for my bike. How cool is that?!
OSM starts to seriously rock. A year ago and today: What a difference.