I have finally jumped into the whole Open Street Map thing. Currently I am scratching my own Amsterdam itch. Believe it or not, but Amsterdam was virtually non-existent in OSM, so I started the Amsterdam topic.
The data acquisition is fun to do … biking different detours to work and recording every car ride.
To give you an impression of Amsterdam before and after I started (different viewpoints and renderers):
The people behind OSM are acquiring funds in the Netherlands in order to jump start the community here (currently at about 5 users).
Do you feel like helping out on building a free map of the world? In March we’ll do the first Amsterdam mapping party!
update: nl.wikipedia.org entry added 