Uzbl follows the UNIX philosophy - "Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface."
very minimal graphical interface. You only see what you need
what is not browsing, is not in uzbl. Things like url changing, loading/saving of bookmarks, saving history, downloads, ... are handled through external scripts that you write
controllable through various means such as fifo and socket files, stdin, keyboard and more
advanced, customizable keyboard interface with support for modes, modkeys, multichars, variables (keywords) etc. (eg you can tweak the interface to be vim-like, emacs-like or any-other-program-like)
focus on plaintext storage for your data and configs in simple, parseable formats
Uzbl keeps it simple, and puts you in charge.
Uzbl is under heavy development. No release has been made so far. See the Get uzbl page
Uzbl:http://www.uzbl.org/