Niner since 2011
The sample project was based on the preview samples: https://msdn.microsoft.com/en-us/library/office/dn986863(v=office.16).aspx
Lync Tabbed Conversations is included with the Lync 2010 Adoption and Training Kit as a free download.
IM an Expert is now part of the Lync 2010 Adoption and Training Kit. http://lync.microsoft.com/Adoption-and-Training-Kit/tools-and-apps/Pages/IM-an-Expert.aspx
Part 2 is here: http://channel9.msdn.com/posts/Lync-IM-an-Expert-Part-2-of-2
@Norman Shey: Here is an article that shows how to add a spell checker. http://msdn.microsoft.com/en-us/library/gg703760.aspx
@Ron: I am able to view the High Quality WMV.
Norman - yes, you can do that, by hosting a Silverlight Lync SDK application in the Conversation Window Extension. Sounds like a fun project. It would be similar to the Translator sample application.