We are picking the most important Nikon of the last 10 years. Not the most widely used or best selling. Those stats will change yearly based on popularity and the more expensive Pro gear will never be able to compete in that regard.
Here are the running total votes so far:
D90 2? (iDunno and Squamish you guys listed flickr and google stats but didn't say if the D90 was your pick)
Now remember there's already a "winner" but we want to know which camera would be the forum's "pick". I'll let this thread run a bit longer before announcing "The Most Important Nikon of the Past 10 Years"