Well, that was painless - nRoute, a forthcoming version, is now running on WP7S and with surprisingly very little omitted. The only thing that got the full-chop was a remote resource (dll/xap) loading helper class other than that just some nip-tucks and if-elses did it.
I'll be releasing toolkit version for the Silverlight, Desktop (.NET 3.5) and WP7 next week, and I'm very existed about some of the new features added. Stay tuned.