Erjang is a virtual machine for Erlang, which runs on Java™.
If you just want to try it out, do this:
curl -O http://dl.dropbox.com/u/1360473/erjang-r13b04-20110524.jar && java -jar erjang-r13b04-20110524.jar
It loads Erlang's binary .beam file format, converts it into Java's .class file format, and loads it into the JVM.
Yes! It does actually work. Though there are exceptions...
Good question. Well, I just wanted to learn Erlang, and it seems to be working!:)