Reporting it on bitzi is probably the best way to warn others. Another thing is to learn the most common viruses and avoid downloading them. This way you won't share them with others and unknowingly help spread them across the network.

This thread has a lot of info about viruses on the network http://www.gnutellaforums.com/showthread.php?t=41432

Then just keep your av updated and scan your files.

__________________
If it ain't broke, fix it till it is!