Ask HN: Running your web app on top of a python http server

When I noticed (via firebug) that Cuil (http://www.cuil.com) uses CherryPy as their web server, Three questions popped up in my mind:

a) Is it a smart decision?

b) Does it explains why they were down so many times in the last 24 hours.

c) Does anybody else is known to be using python servers in production instead of python application integrated via (cgi/fcgi/mod_wsgi) with apache/lighttpd/nginex and alike?