Mudface on 02 September 2008
Here's a couple more links to browser/ OS stats if anyone's interested-
http://en.wikipedia.org/wiki/Usage_share_of_web_browsers
http://en.wikipedia.org/wiki/Usage_share_of_desktop_operating_systems
http://www.w3counter.com/globalstats.php
http://marketshare.hitslink.com/report.aspx?qprid=1 (their sample seems a bit US-centric, no other sites listed here have OSX so high.)
The Steam hardware survey is usually quite interesting as well, although that obviously only covers PC's running Windows.
