He is still around. Wiki gives his post-PARC resume:
https://en.wikipedia.org/wiki/Alan_Kay
Most recently he has been running a small research institute:
http://www.vpri.org/html/work/NSFproposal.pdf
Source: http://www.bloomberg.com/news/articles/2015-01-29/sap-looks-...
Introduction and Overview - Alan Kay
2D Rendering (Gezira & Nile) - 17:05 - Dan Amelang
Domain-Specific Languages (OMeta) - 34:20 - Alessandro Warth
Imperative & Declarative Programming (Programming as Planning, Executable Specifications) - 59:38 - Hesam Samimi
Always glad to see someone discover one of the greats. :)
(edit) Oh wait, you probably already knew he existed. Tried to read too much into your post.
I don't know of a more prestigious group working on a more important area than CDG.