cmNodes v1.0 is available for download
cmNodes requires Cinema 4D R14 or higher on Windows or OS X.
It's a little ahead of schedule, but here it is. I know that there is not much documentation, but I hope that there is enough to get you started. Feel free to ask questions and I will do my best to answer in a timely manner. I already have many more features planned but there's bound to be things that I haven't thought of or considered, so I'm glad to take any suggestions.
While cmNodes has been tested pretty thoroughly on a variety of hardware, it's a complicated piece of software and should be considered a work in progress. If you encounter any problems please use the contact page to send me a detailed description.
Update (2013/12/22): The latest version can be found here: cmNodes 1.5.07