Are there any MVC frameworks available for WPF other than Caliburn (which looks awesome btw)?
There is Composite WPF aka PRISM from Microsoft Pattern & Practices.
http://www.codeplex.com/CompositeWPF
There is also Magellan, a port of ASP.NET MVC for WPF.
one additional possibility is pureMVC (www.puremvc.org)
Regards, Paul
Both Caliburn and PRISM are very nice. However if you go down the path of MVC you will miss out on the powerful 2 way binding. Consider MVVM, it's a very clean and practical approach for WPF. This is the pattern Microsoft used for their expression blend.
A new MVC framework that works with practically and .net technology (WebForms, WinForms, WPF, Xamarin Forms) is SimpleMVC by Gateway Programming School. This link gives an overview and example usage.
A short example is to create a controller from SimpleControllerBase that has your business logic. This will depend on the SimpleModelBase implementations you provide. Implementations of ISimpleView are handled through WPF pages and controls. The derived controller only works with the interfaces that extend ISimpleView so that the WPF parts are abstracted away. You then use properties on the view to do two-way data-binding, just like MVVM, but with a proper layered architecture.