I encourage you to take the CR sources and play with them and try to advance them. Anyway for the next months I will work very little to improve CR: I have little time and I'm split in between work, family and other time consuming issues.
What I've learn is a fairly deep how a CIL instructions work, and that is possible technically to move most of instructions (if not all) to a C++ implementation, but there will be always bugs and work-arounds and they require time which very few people want to invest (none!?).
Based on this, I can say that I will be glad to support people to write tools or help them fixing bugs, but I will not work for now at least to improve CR. Maybe when you have more time, please try to add a feature or to fix something. Some parts are partially implemented and they need just "moving code around" to support more cases: delegates, generics, virtual calls have at least some code to start. If they are fixed, basically it will work a good chunk of .Net 2.0 codes.
This is it for now, I really hope that some people will try to clone the repository and improve the code and later I will be really glad to improve the needed parts, elsewhere it looks for now a too small incentive to make it work.