Trend Micro has opened up a beta test for its anti-virus scanner, PC-cillin.
PC-cillin's enhanced Personal Firewall provides solid protection to help prevent intrusion attempts from unauthorized users while you are connected to the Internet. The PC-cillin Personal Firewall is a stateful packet inspection firewall. Unlike packet filter firewalls, stateful packet inspection firewalls not only examine the headers of a packet, but also the contents.
More info:
hxxp://www.trendmicro.com/en/support/beta/pccillin/overview.htm

here is da link to if u want to try da beta ;)