I came across an excellent keynote from the Enterprise Connect 2012 that was just a few weeks ago. The keynote was given by Kirk Koenigsbauer Corporate Vice President, Microsoft Office Division Product Management Group. This 45 minute presentation talks on Lync. How its doing, where its going, Lync and Skype (but mention no dates) Windows 8 and Lync and finally the whole Wave 15 family.
Some great information in this video!