You are completely wrong about Erlang, which is absolutely not a research language, but when combined with OTP a very pragmatic tool designed by Erlang to answer their specific needs. Now it doesn't mean that it's the right tool for any problem, but when used for the right jobs, it is awesome : elegant, mature, rock stable and definitely production ready. And the community is growing...
For more generic purpose as far as functional languages are concerned F# might have a go, if Microsoft continues to push its efforts to integrate it in Visual Studio and make it mainstream. With .net/mono under the hood the libraries are there. Not completely production ready yet in my opinion, but hopefully soon I'll be able to use it instead of C# when I have something (fast) to do on top of mono...
For more generic purpose as far as functional languages are concerned F# might have a go, if Microsoft continues to push its efforts to integrate it in Visual Studio and make it mainstream. With .net/mono under the hood the libraries are there. Not completely production ready yet in my opinion, but hopefully soon I'll be able to use it instead of C# when I have something (fast) to do on top of mono...