Anti-Viral Software for Unix?

dameon asks: "I have been looking at using samba to serve NT Files in my office. Currently we use NT servers and pay a premium for HP NetServers. I recently arranged the purchase of a small cluster and a 1.5TB NAS device for some CFD calculations we are doing. My NT Server is scheduled to be replaced this year, and I don't want to spend any more money than I have to. So, I wanted to use the existing VA NAS device to do the serving. I ran into one problem: the lack of commercial Anti-viral software for Linux. My company (large to say the least) uses Norton Antivirus exclusively. They will not accept anything else. I cannot guarantee that the client PC's all have updated Virus Definition files, so I need to have the server protected. My question is this: What will it take to get commercial Anti-Viral packages to list Linux as a supported platform? I am surprised this hasn't been a bigger issue to date. Or perhaps I am missing something." Anti-virus scanners aren't anything new to Open Source software, is this the reason why players like Symantec haven't tried to break into it? If not, what would Unix users need to do to convince Symantec and other commercial entities that there really is a market for native virus scanners?