If you have a little spare time, the following things might help it seem not-dead:
* Add a tiny blog post so the date on the main page isn't May 2012.
* Add a "low-hanging fruit/wishlist/todo" to the http://www.uzbl.org/contribute.php page - I see "how do I get involved in XYZ" questions here and on Reddit all the time.
http://uzbl.org/
It's a good project that could use a few hands.