Sascha Willems keeps really quiet about his blog, but it makes for very interesting reading indeed. Recently he's covered such topics as...
<ul>[*]Springs ( click the link for the video )[*]Cel Shading[*]Newton's new Vehicle Container ( click the link for the video )[*]Different Shadow Techniques[*]A Walker ( click the link for the video )[/list]

and how the amazing NewtonPlayGround has grown. I'm hoping he'll port it to SDL as well, maybe using SDLCtrls for the GUI.

All I can do is encourage you to read his blog on a regular basis and leave him some constructive comments about his work.