WPF

if you have been working with Windows Presentation Foundation -A.K.A Avalon- lately, i recommend reading the following articles/blogs so you are up to date with the changes introduced on the latest CTP bits:

ModelVisual3D -- Changes to WPF 3D
ModelVisual3D vs. Model3DGroup -- When to use which?

i also found this tutorial very helpful, it is already updated BTW

right now i'm re-writing my old apps -nothing fancy though-, hope all come together.

PS: i really recommend you guys adding Daniel Lehenbauer's blog to your aggregator