Good to see that Lync 2010 documentation is available on technet now. If you are someone of those willing to learn Lync or already working on OCS and want to upgrade your knowledge this documentation is right for you. You must know the common OCS terms to understand this documentation although.
So, what are you waiting for? Just click http://technet.microsoft.com/en-us/library/gg398616.aspx and get your copy of documents downloaded.