This port really does little but fetch the scoop distribution and install it into /usr/local/www/. It provides instructions on how to run the install.pl script afterwards.
Importantly, though, the port pulls in all the perl CPAN modules required by scoop. (It also ensures that MySQL, apache, and mod_perl are already installed.) This is how the FreeBSD port system works -- it doesn't rely on the CPAN mechanism.
The port has not yet been reviewed by anyone but me. It is in the queue for review and will be submitted once it passes muster. In the meantime, if there are any FreeBSD'ers out there that want to look at it, the pr with the port is here:
http://www.freebsd.org/cgi/query-pr.cgi?pr=45247