While it’s true that Google widely uses Linux, you’d be amazed at how many BSD and Solaris advocates work here. The number I’ve met is quite large indeed. Maybe even large enough to our own Special Interests Groups (SIGs) with regular meetings.

Without further ado, my latest onlamp.com article:
http://www.onlamp.com/pub/a/bsd/2006/02/16/os_fingerprint_filtering.html