[dangerous]

JKT, why does malware need admin privileges to run? Even a "normal" user is able to send email. It can install itself into a hidden directory in the users home directory and add an entry to the users crontab to get it to run as a daemon on startup. If a virus for mac was actually out there taking over machines, we'd find out about it very quickly anyway. Running as admin is not the same as running as root, I can't make really stupid mistakes like accidentally wipe out my system. I can do the things I need to do everyday without having to switch user - admittedly I could probably manage as a normal user if I added it to the sudoers file (and only if)... but why should I? I've been running OS X since DP 3 and have never had a problem caused by me being an admin user.