Dave Campbell of WynApse has been digging into WPF/E and has a set of samples (a few with tutorials) up on his website. These went up at the end of December but I missed them somehow. A few interesting things here, including a commentary on the scRGB color format supported by WPF/E (inherited from WPF). Also nice is that each sample includes the code in the page.
WPF/E Stuff at WynApse: