As we get closer to the MMS at the end of April we are getting closer to the release of R2. Yesterday OpsMgr 2007 R2 RC (6.1.7043.0 build) was released on connect along with a bunch of documentation which will provide the foundation for the RTM documentation.
It is a big download at 1277 MB.
Good timing as I am back from holiday and I can install it and have a look. Usually, but not always, with a release candidate it is feature complete so it is now in the bug testing phase.