Two things:

1) MacFair LA is scheduled for November 12-14 in
Cerritos College. Buy tickets at:

http://www.macfair.org/

I'm planning to go on Nov 13th (Saturday).

2) Symantec has a good security scanner at

http://www.symantec.com/avcenter/index.html

Requires Safari 1.0 if you're on MacOS X

Alex