It has been a little while since we had a nice Cogmap blog post, so without further ado:
Cogmap new charts since inception:
You can see the traditional initial PR burst and then how adoption has grown over time. In May, 2007, we added a lot of maps internally, so that is an artificial spike. March 2008 saw the introduction of private maps. Adoption has fairly consistently grown since then.
What does it all mean? Comment away.