The Quake 3 Arena page has been updated with word of a Quake III Test Server List to list and locate Q3ATest servers. Thanks Q3Arena.net. Here's the lowdown:

We've whipped up a quick webpage that will show you a list of Q3Test servers reporting to our master server. It's really ugly at the moment (read: It's functional) and we'll tidy it up tommorow.

Remember, if you are running a Q3Test server, and would like for it to report to our master server, make sure you start the server with +set dedicated 2

http://underworld.idsoftware.com/cgi-win/q3aservers.exe/