The McAfee virus scanner for *nix is supposed to work for all flavors, including Linux... if you want to pay for it. Symantec is working on a *nix version as well. So far, the McAfee product scan it's host server only, but testing is still going on to have it work across the network as well. The closest thing to providing any other good information we have seen has been from NESSUS, but we are still getting some false-positives there as well.