JeffCroft.com: Django for non-programmers.

While it's not his point, I've been thinking lately about how these frameworks (Django, TurboGears, Rails) are so good for rapid prototyping that designers could use them to add lightweight data and logic to prototype designs, without the involvement of an engineer. It seems like, at least in some cases and for some people, it could save a lot of time mucking about with sample data in screenshots.

Related: TurboGears' Kid template system uses XHTML attributes to insert templating logic, so the templates can contain their own sample data and render almost perfectly directly in a browser without an application behind them.