I must be the only person who thought this was about the gem using Actor pattern. Great write-up. I really appreciated it as concurrency was something I've been looking into and was about to start toying with the Celluloid gem. This was a really good, clear example with useful code. Thanks!<p>Of course, adding the word "gem" to the title might indeed help. Now, an article on creating the material celluloid would indeed be awesome... volunteers?