Norman Transcript - Free firewall programs from ZoneAlarm, Comodo and Kerio are good choices, with ZoneAlarm (link on my Web site) being a bit easier to keep track of. They all will do just as good of a job as any consumer-oriented product from Symantec/Norton or McAfee

Macs don't get viruses but new trick could save the day
Detroit Free Press - A software firewall in the line of Comodo (if free is the measure) also would be good, a hardware one too if it's possible. That flash ad problem was on the websites side in the way the ads where written. Look it up. Also that Sony "bug" as you put

Comodo Firewall Sees Rapid Download
WHIR - January 18, 2008 — (WEB HOST INDUSTRY REVIEW) — IT security solutions provider Comodo ( comodo.com ) announced on Thursday that the latest version of Comodo Firewall Pro Version 3.0 is being downloaded and installed at a rate of almost 40,000 new