Saw this recently:
(Forgot to mention earlier that I saw it via a retweet by @Phaseit.)
Learn how to code a Facebook app in 20 minutes on PythonAnywhere.
I had blogged about PythonAnywhere a couple of times before. As per the above link, it now seems to support hosting web apps. The link is about creating Facebook apps with PythonAnywhere. I'm not a Facebook or Facebook apps fan myself (or of create-something-in-20-minutes demos a la Ruby on Rails :), but the hosting technique is probably generic and so may be usable for non-Facebook web apps as well. (Caveat: I need to check that.)
- Vasudev Ram - Dancing Bison Enterprises