Hey rojart,

thanks for your comment. I emptied my inbox. What I'm really interested in is this approach:
http://www.iryokufx.com/mlaa/
the results are way better than mine. But I find no technical paper describing their technique.
You'll get a demo of it when it's working properly.

Joey.

edit: the shaders are in GLSL, so you'd have to convert them anyway.