The newest malware for the mac is called MACDefender - it trojans with fud about their being malware on your machine and you need to protect yourself (that's original

) It does a pretty good job of looking "mac-ish" and auto-downloads a file to you, which automatically starts up and moves towards asking you for your password.
Ah, "just say no." It can't hurt you if you don't install it.
One of my physician clients got phished by using a google image search for "ct atlas vidian nerve." I've identified the ISP and notified them.
Here's a shot of the web page as it's downloading to your machine:
