I should have checked this before reading it today, but OgreDotNet exists and is going very well. Currently appart from the wrapper from C++ to .NET (it supports Mono too) there are some basic and intermediate tutorials and a forum to help and answer questions.
I wish I had more spare time to test this. I havent't touched any game dev. code/experiment since months due to work :(
Update: OgreDotNet is almost stopped, being replaced by MOGRE (Managed OGRE).