Bob Ippolito's talk on C4 about concurrency oriented programming, hot code reload, fault tolerance. See http://undefined.org/c4-1/ for code and slides.
Bob isn't afraid to blaze technology trails, and he has the arrows in the back to prove it. You may remember him from his awesome PyObjC efforts, and his latest triumph is using Erlang to power an ad network for flash games. Listen in as he introduces the language+environment and waxes poetic about hot code reloading, fault-tolerant runtimes, concurrency oriented programming and function pattern matching.