Unicorn scan doesn't to work properly on BackTrack3 Beta. Here is the command I tried and its resulting output:
bt ~ # unicornscan
Main [Error parse.l:158] error opening file `/usr/local/etc/unicornscan/unicorn.conf`: No such file or directory
Main exiting unable to get configuration: system error No such file or directory
EDIT: Oh, and this is on a MacBook 2.0 ghz.