[Izzy Dunne]

The good news is that OS X makes you authorize the installation of this crap, unlike Windows, where it happens without you knowing it (until later).
The dialog should warn you that something's weird (why do I have to give my password just to play music?).

The bad news is that Sony is a trusted name (for how long???) and that people might do it anyway...

[catbertz]

Sophos, a big corporate anti-virus company, has released a sony rootkit detector/remover.

It's fast and doesn't install to your registry..just run it from your desktop.

Here's a link: http://www.sophos.com/support/disinfection/rkprf.html

[Senator Bedfellow]

The good news is that OS X makes you authorize the installation of this crap, unlike Windows, where it happens without you knowing it...

Actually, without administrative permissions, it doesn't install at all.