Here's a demo of at least one method of the exploit, a .pdf with embedded .swf

So far I've not found anything to show a computer being attacked by a .swf file alone. If it is just Adobe Acrobat Reader causing the security hole then Nokia and Adobe don't have to upgrade the Flash Player on the N900 because we don't have Acrobat Reader...

http://www.youtube.com/watch?v=cIY0-3DyQvA