SP2's new security and firewall features are not just geared towards people who use IE and the RealOne Network.
If you download, connect to the Internet, recieve email, or anything else that connects you to the digital realm, you're at risk, and SP2 helps. End of story.
This "IE is the only problem" stuff is just pure horse crap. You may be more at risk using IE, but if you're an idiot it doesn't matter what you use.
IE ain't going anywhere, either, so we can ditch that myth too. IE is still most widely used, and the most compatable with new (and existing) technologies, and remains the key focus for web developers and browser-application developers.
Bottom line: It doesn't matter what browser or OS you use, there's nothing better than intelligence. A firewall alone won't save you. A VP app alone won't save you. And you could have Linux with the worlds best AV apps and firewalls, and still get wasted if you don't make an effort to keep things up to date and connect smartly.
This is the digital age, and like anything else (banking, owning a car, home, etc) you have to make an effort to protect yourself. If you don't keep your AV apps up to date and you go surfing through shady websites and P2P sites, the viruses you get are your own fault and not the applications.
The tools have been provided. Use them, or don't complain.