Kerry, I took a bunch of C# classes, which all reinforced what I have been relearning. I cant seem to get enough time in code wise to remember everything I have been studying. 2 of the classes I took were on WPF, which was UBBER cool. Fenton Webb taught both classes, and showed some amazing stuff in autocad. Then I took a LINQ class so I could try and spend some dedicated time learning LINQ. What a cool addition they added. AND, I learned about Lambda expressions which are replacing something or another, I will have to dig through my notes. I took the .Net 4.0 class, but learned that there is a pretty major bug which Microsoft is working on with Autodesk as we speak, so I would not advise upgrading to 4.0 yet. The guy teaching that class had some "patched" DLL files which he said were not available yet, and that 4.0 would not work with 2010.
All in all, I had great classes and learned a lot of things I keep hearing you guys talk about. Now if I can just get enough time in coding so I dont forget the new stuff.