There is no official package for uzbl on Ubuntu. However, you can use the one available on my PPA.
Add the following to /etc/apt/sources.list
* Jaunty
deb http://ppa.launchpad.net/pplr/uzbl/ubuntu jaunty main deb-src http://ppa.launchpad.net/pplr/uzbl/ubuntu jaunty main # PPA for WebKit Team deb http://ppa.launchpad.net/webkit-team/ppa/ubuntu jaunty main deb-src http://ppa.launchpad.net/webkit-team/ppa/ubuntu jaunty main
* Karmic
deb http://ppa.launchpad.net/pplr/uzbl/ubuntu karmic main deb-src http://ppa.launchpad.net/pplr/uzbl/ubuntu karmic main
Trust the Webkit Team
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 2D9A3C5B
and me
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 2A8BDB14
sudo aptitude update
sudo aptitude install uzbl-{core,browser,tabbed}