We are evaluating ZoneAlarm Integrity right now.
Centrally managed "endpoint" (AKA user/computer) firewall. Just like regular Zonealarm at home, just centrally managed with enforced policies, AV definition checking, web based jakarta/tomcat management interface etc etc.
Very cool product.
We also use Symantec AntiVirus Corporate edition to centrally manage the desktop AV and set policies etc.
Its things like that which save our asses every day, even more so now.
Actually, my vote for the best value security product is Guinevere.
Its an email AV gateway and costs <500 bucks, that really has saved our ass since Sunday evening when sobig hit. It only works on Groupwise, but at least to date there are ZERO viruses written for groupwise