Gábor started the WiX Tutorial during the WiX v2.0 days. (Ah, we were all so young, then.) Over the years, the tutorial has grown to cover WiX v3.x and built a localization project to help contribute localizations to the WiX project.
Now the WiX Tutorial has moved to FireGiant. Take a look at the blog post I wrote to announce it. Then take a look at the tutorial itself. And do let us know what you’d like to see in the tutorial going forward!