Why Sphinx for documentation

Will Kahn-Greene on "Why Sphinx":
Sphinx is a fantastic tool for organizing documentation for a Python-based project that makes it pretty easy to write docs that are readable in source form and can be "compiled" into HTML, LaTeX and other formats.

There are other doc systems out there, but given that GNU MediaGoblin is being written in Python and I've done a ton of documentation using Sphinx, it makes sense to use Sphinx for now.