If you've wanted to take your Adobe Illustrator files and create Silverlight XAML, now there's hope. Mike Swanson, one of our technology evangelists, created a plug-in that only worked on Illustrator for Windows. He's taken the time to learn Xcode and create a test version of the Illustrator-to-XAML plug-in for Mac.
Mike has tested it with CS4, but not earlier versions. If you're interested in testing it, his blog post has plenty of details about how to get it. If you test it, leave him some feedback about what's working for you and what's not!
It's pretty cool to see a plug-in like this come about. I haven't had the chance to check it out myself yet, but figured you guys might be just as interested as I am.