It has happened. Just a few minutes ago. The 10000th commit to the CDK source code repository. Miguel was the lucky(?) one. From our IRC channel #cdk on the irc.freenode.net network:

[19:55]  cdk: miguelrojasch * r10000 /branches/miguelrojasch/
  reaction/src/org/openscience/cdk/ (2 files in 2 dirs): Removed Flags. 
  They were not used anymore.

And a screenshot:

The first source code was actually only added with the 5th commit, made by Christoph, days after our meeting with Dan (of Jmol fame) at Notre Dame in September 2000.

The full list of people who contributed to this enormous success is provided by OHLOH.

This post was originally posted as https://chem-bla-ics.blogspot.com/2008/02/10000-cdk-commits.html.