Interesting that there's no mention of Tornado [1]. (Disclosure: as a co-author of O'Reilly's Introduction to Tornado, I'm biased in its favor.) I haven't played around with Brubeck [2] yet, but I also hear many great things about it.
Needless to say, there are some great Python web servers and frameworks out there that aren't listed on that page.
[1] http://www.tornadoweb.org/
Edit: Added links