Joe Williams home
Something I happened to see over here this weekend was Disco. It is a Map/Reduce framework written in Erlang. A user/implementer doesn't need to know a lick of Erlang to get rolling but according to their site most folks use Python to write the actual jobs. If you as me a Map/Reduce framework built using Erlang makes a great amount of sense due to its message passing and light weight processes.
Fork me on GitHub