I just found out (through Adam Kinney's great Continuum show) that there is a Fireworks to XAML Panel for Fireworks. I haven't used Fireworks in a few years but I used to love it (though it seems that Adobe hasn't been investing in it). It now works with Silverlight too!
You can see him talking about the plugin on Channel 9 here:
http://channel9.msdn.com/shows/Continuum/Fireworks-to-XAML-Panel
