I'm definitely not the most prolific photographer, but it only took me 4 years to publish 5,000 photos to Flickr. Not all are publicly viewable, but they are all available under a simple Creative Commons Attribution license.
Here's #5,000 - my 2008/366photos from today, of my son Evan being a typical pyromaniac kid at the campground this morning :-)
[caption id="" align="aligncenter" width="500" caption="pyromania - evan doing what boys do: find out what burns and what doesn't."]
[/caption]