OMG, Installing Metasploit on Ubuntu is SOOO easy now. I installed it all of 5 minutes by following the instructions at http://www.metasploit.com/redmine/projects/framework/wiki/Install_Linux.

Download the Linux 32-bit (x86) installer from the downloads page and run the following commands:

$ chmod +x framework-3.*-linux-i686.run
$ sudo ./framework-3.*-linux-i686.run

Once the installation process is complete, enter “hash -r” to reload your path. At this point all of the framework commands should be in the system path (via symlinks in /usr/local/bin), and the framework can be updated by running “msfupdate” as the root user.