OS X Leopard users should read this...

Apparently your firewall isn't doing so well, and causes vulnerabilities compared with windows xp prior to service pack 2 (which caused the huge malware storm about 4 years ago).

Its been on slashdot, so if you read that, you've probably seen it.. but if not, here's the German security firms test results of the new "firewall" 

http://www.heise-security.co.uk/news/98156 

http://www.heise-security.co.uk/articles/98120