While Wyam is certainly still usable, it's been rebranded and rebooted as Statiq with a ton of improvements. You almost certainly want to look there unless you're already a Wyam user.

Built With Wyam

Many sites and blogs are realizing the benefits of an extensible, flexible, native .NET static site generator. It can be helpful to browse these sites and their source code if available to get an idea of the possibilities. Please add yours to the list if you've built something with Wyam and want to show it off.