May be of interest, it's been a long time coming.
http://blog.scotsnewsletter.com/2008/03/24/the-best-firewall-software-of-2008-online-armor/
Comodo seems to do pretty well for a free product...
Your right rik, free is always good, not a fan of the comodo useability myself tbh. Plus the fact it completely screwed my tcp/ip stack. One or the other seem to do the job well enough. Can't believe it's taken him so long to come up with that end result....
He was being thorough? ;)