First of all, you should know that I'm not aware of anyone else attempting to do this. So you would be the first. I don't mean to discourage you, I just want you to be aware you're going to be taking the lead on this one :)
Second, I don't have a lot of experience with WPF, so I'm not much help there. I do know that Jeremy Miller has been doing a lot with WPF in his "StoryTeller" app. He's got a lot of good presentation patterns in there that I would encourage you to investigate thoroughly before you attempt the FubuMVC+WPF?
-Chad