Browser stats for USC.edu from finals week last December:

Web browser                 Page views      %
Internet Explorer/6.           4832922    72.70%
Internet Explorer/5.           1130105    17.00%
Gecko                           242722     3.65%
Netscape Navigator/4.           174118     2.62%
Safari                          155681     2.34%
Netscape Navigator/3.            58450     0.88%
Internet Explorer/4.             27761     0.42%
Netscape Navigator/2.            25670     0.39%
OS                          Page views      %
Windows XP                   3,240,173    49.69%
Windows 2000                 1,360,074    20.86%
Windows 98                     853,311    13.09%
Mac                            470,978     7.22%
Windows ME                     343,354     5.27%
Windows NT                      165055     2.53%
Windows 95                      53,439     0.82%
Linux                           25,844     0.40%
Sun                              8,904     0.14%

Gecko-based browsers finally beating out NS4, although it’s still hanging in there with an inordinately large percentage. (combination of user labs, ancient machines, and software.usc.edu)