Agreed. I'm currently running a site over at http://readthedocs.org/ which is meant to be your one-stop shop for Sphinx documentation. It has most of the big python projects on it, and hopefully as sphinx gets more popular, it will attract others as well. For example, we are mirroring the Varnish docs.

We also had a kick-ass designer help us on it, so the site actually looks rather pretty.

I've had a number of people tell me that RTD has been something that has spurred them to write documentation, so I'm really happy with the results thus far.