Django, because it has magical powers, who can beat that?
(Also, read the comments for more fun)
So I'm using a very small dispatcher Servlet to pass JSON messages on to POJOS and do all the templating in the browser using jquery.
I'm bored to death (and rather annoyed) by Java so I'm always looking for alternatives that support my architecture.
I've recently become a Django convert (not for the pony, that was new to me just now) because the framework just works. I haven't quite worked out the magic required to stand up a Django/MySQL/Apache/Mod_Python server on Windows yet, but it's working perfectly in my VM, so I haven't pursued it very far yet.