I use qscanq/clamav with spamassassin, but spamassassin is on a per-user config, not site-wide. Works great.
I'm very pleased with qscanq/clamav for virus scanning and SpamAssassin's qmail-spamc/spamd combination for spam tagging site-wide.
-- Tom Collins - [EMAIL PROTECTED] QmailAdmin: http://qmailadmin.sf.net/ Vpopmail: http://vpopmail.sf.net/ Info on the Sniffter hand-held Network Tester: http://sniffter.com/