I have assembled some POI statistics for Europe and Germany. The idea is to track development over the next couple of weeks/months. Just follow the link or go to the OSM wiki stats page.
The data comes from cloudmade's POI.gpx files and is extracted with a simple bash script. I am happy to pass it on in case someone is interested
UPDATE (7/12/09): There is an error in the calculations. It only counts POIs with names. I will update it tonight