you're right there is no Winforms sample yet, we should add that.
For now, hope this walkthrough might help you out
-in VS2008 create a new "Volta Windows/Winforms Application"
-write a class you want to run on another tier and use it from your winforms code
-right-click on the class, select refactor and choose "Tiersplit..."
-a RunAt attribute will be added to the class as well as an app.config to the project
-hit F5 to launch the winforms app as well as the webserver running the other tier.
If you run into any problems, let us know on the Volta forum: