Overnight Visual Studio and TFS 2012 became available on MSDN for download; I really pleased to say that the ALM Rangers also SIM shipped all our 2012 guidance at the same time.
I have been working on two of the Ranger project for the past year and have to say I have learnt a lot working with such a great crowd of Microsoft and external TFS experts. Some stuff I learnt was about the 2012 release it is true, but there was plenty on working with a a globally distributed team with a whole host of logistical and time constraints.
It has been a blast, but there is still more to do. Keep an eye open for supplementary ranger guidance releases in the next few months, but for now why not download and read the released guidance and do the hands on labs. I really do think they will answer many questions you have about TFS.