I recently started a blog (where I talk about Jewish religious topics) and I get the following browser share stats (note: the people who read this blog are not techies by any stretch of the imagination)
IE: 56%
Mozilla/Firefox: 37%
There is no question in my mind that Mozilla/Firefox is catching on.
The OS share numbers are also very interesting:
Windows XP: 64%
Windows 98: 24%
Windows 2000: 3%
Windows 2003 Server: 1%
Mac OS X: 1%
92% some flavor of Windows, but it is fascinating to see how many people are still on Windows 98%.