There are plans to automatically produce help pages. However, I'm not sure what status they currently are in.
Regarding REST API versioning, here are my three rules:
1) You don't need it.
2) If you really do need it then find a way to version your media types.
3) If it is too late, and you already have tightly coupled clients, then your last resort is to put a version number in the URL and start again.
Check out Stackoverflow for lots more discussion on versioning of REST apis. Here is my opinion http://stackoverflow.com/questions/972226/how-to-version-rest-uris/975394#975394