Here is my unscientific will probably only work once method for getting the latest version of w3af to run in Samurai WTF (http://samurai.inguardians.com/):
After I updated w3af using the svn update menu in Samurai, launching the w3af GUI present some errors. It seems that the latest version of w3af needs some extra python fu libraries. Fortunately, w3af is very helpful and suggests which packages to install. Unfortunately, doing an apt-get for the required packages returned a message of Couldn’t find package __X__ for each package.
The Samurai WTF version I am using, .9something, is running an older version of Ubuntu, Jaunty, whose packages are not actively maintained.
To get the required packages, the following worked for me”
Add the following to /etc/apt/sources
deb http://old-releases.ubuntu.com/ubuntu/ jaunty main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ jaunty-updates main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ jaunty-security main restricted universe multiverse
Do an apt-update
apt-get python-svn python-scapy and python2.6-dev
The next piece of the puzzle was python-nltk, which had to be installed manually from nltk.org. The source is available on the site. It require one python-yaml, which could be added with another apt-get install python-yaml..
Then finally, follow the instructions from w3af on how to install pybloomfiltermap and success….w3af GUI goodness.
Your mileage may vary.