Although it isn't tagged, the control at the bottom left is a radio button group (yes, I just reused my checkbox textures). The control at the top left is a very over-sized checkbox with corresponding label (note the tool-tip in action). In the middle is a static image control with my engine title. When you press the "OK" button it causes the static image control to play its animation, which is currently just a little shimmy & shake move.
Here is an example of the XML code to cook up the push button.
There are lots more features that I've got working which aren't really visible via a screen shot, so perhaps when I get all of the base controls implemented I can push out a demo for all to play with. That's probably at least two or three weeks out though!