We've just released a new version of PythonAnywhere. It has a lot of small changes: we've installed a bunch of new packages, and added the option to put basic HTTP authentication in front of your web app (for example, for sites that are under development).
The big changes in this release are all under the hood. We've completely reworked the way we construct the sandboxes that your code runs in. This means that in the future it will be much easier for us to install new packages when people want them, and -- perhaps more importantly -- we'll soon be able to support different sandbox images for different people. This means that we'll soon be able (for example) to provide Django 1.6 for new users without breaking the web apps of the people who use 1.3.