Good docuentation, beautiful website, and search that is very much inspirsed by Django's ORM. Certainly the best option out there for search.

It currently support Solr really well, and Whoosh (Pure Python) decently.

Very cool... Xapian, Sphinx and Hyper Estraier support should be coming soon: http://haystacksearch.org/docs/backend_support.html

I'm not so sure about Sphinx support coming anytime soon: http://github.com/toastdriven/django-haystack/issues/labels/...

From my experience using Sphinx, it would be a non-trivial task to make it work with Haystack. There's the django-sphinx project which is what I currently use, but I remember getting started with it was kind of a pain. It's speed is really nice though.

I like the links that highlight with rounded corners.

I started coding up a site using this (yesterday, actually) and it's very easy. Whoosh support is cool, although you have to use a forked version that reverts a couple changes. One thing that bothers me is that you have to label the template files for search results as *.txt for some reason.

Looks promising