OCS 2007 R2 Architecture poster
Yes, LYNC is coming, but for those Hosters who arent early adopters and are going for stability: a great blog post about OCS 2007 R2 and the associated data flow, click here: https://blogs.technet.com/b/ucedsg/archive/2010/02/03/very-cool-ocs-2007-r2-architecture-poster-available.aspx