Nothing specifically for virus', since there still haven't been any found in the "wild" for any OS X OS. But it might help to prevent forwarding them to my PC friends.
Software: <
ClamXav>, XProtext (10.6 & 7), Firewall enabled, AdBlock, Autofill disabled, 1Password, disable 'Open "safe" files after downloading.'
Brainware: Remote images disabled in Mail, Don't click email links, never trust senders ID.
Personal beware: Never download from unfamiliar sites, use email alias' for new registrations, don't use Facebook/Twitter/social networking sites.
Frankly, I have certain hesitancies in paying a company for 'protecting' me from things they take pride in 'finding.' Seems like it's close to the line of 'conflict of interest.'
I'm both paranoid and cynical!