Hello Willem:

You can find example sites in our showcase at any time, and you can even add your own.

http://mmmcommerce.com/Showcase

As for the payment providers, you can see which are available by either starting a free trial and playing with Hotcakes directly, or viewing the documentation. Links for both are below.

http://upendoventures.com...Hotcakes-Cloud-Trial

https://hotcakescommerce....s/201107645-Payments