Mac anti-virus programs

iAntiVirus - Free AntiVirus for Mac

There are more and more threats being created for Mac computers. iAntivirus is a free anti-virus program that may be suitable for most Mac users. It only targets Mac-specific threats (so, if you are not sharing files with a PC or dual-booting to Windows, then this should be sufficient).
The free version of iAntivirus comes is full-featured and only lacks the support features - updates are automatic and free.

One other drawback to this free software - it doesn't cover OS versions prior to 10.5

For other programs, check out these reviews at About.com It seems the most comprehensive anti-virus (in these reviews) is the paid Norton Internet Security for MacIntosh program.

If you have other recommendations, please leave them in the comments.

Rogue anti-virus software points to fake reviews

Rogue anti-virus software points to fake reviews - The Inquirer < read full post

Watch out for rogue anti-virus programs, period.
This one in particular (Anti-Virus-1) is altering the host file so when you go to certain legitimate review sites, you will get automatically redirected to fake versions of the site which give glowing reviews of the fake anti-virus program.

UPDATE - More on this at
Ars Technica: New malware attempts legitimacy by spreading phony reviews