I've finally come full circle. I initially intended to write about a pre-existing wizard that I rebuilt before I found out about xaml controls. Ignore the irony about writing a series on using xaml controls and giving the final how-to article using the old controls but I did build the wizard(s) before I discovered the system; so there's that. Also, as I mentioned at the end of the first article, there's a sample tutorial wizard provided by Sitecore, built using the new xaml controls which can be used if you're up to converting it.