The Auth Server I've been working on is finally available on github at http://github.com/finder/erl_auth

I spent the majority of my weekend writing a generic caching server for Erlang to be used with my authentication/authorization lib. Originally I had created an auth lib (it still exists, but will be dead) at Google Code but decided to translate it from Python to Erlang, and hopefully make it better. One of the requirements was a limited in memory caching server. I could use memcached, but I couldn't think of a better first project to write in erlang to get my feet wet before starting the big authentication library.