If you want to learn more about Concurrency and Concurrent algorithms, then you've come to the right place.

Start by reading "The Art of Multiprocessor Programming" if you haven't done so already:
http://books.google.com/books?id=qGURkdAr42cC&printsec=frontcover#v=onepage&q&f=false

In case you want to watch an interesting talk on concurrency and lock-free/wait-free data-structures, here is the presentation that Maurice Herlihy gave at Microsoft Research in June 2012:
Part 1:
http://research.microsoft.com/apps/video/default.aspx?id=168298

Part 2:
http://research.microsoft.com/apps/video/default.aspx?id=169831