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It's from Microsoft, not likely to interest the Java crowd is it? After all, we don't see any C# code running on the JVM either even if it is pretty darn close to being Java.next.

Agreed. F# doesn't even run on the JVM, and that's pretty much a killer right there. There's nothing stopping anyone from writing an F# compiler to produce bytecode, but a lot of the knowledge, tools and libraries that have been built up around the language will be useless, thanks to .NET's dependence on Microsoft-proprietary libraries. Just look at how much trouble the Mono project has had, and they're not even trying to port to a new platform!

I liked the discussion that arose around the article, hence voting up. I don't think JVM needs F#, because JVM has Scala. Scala has enough of "OCaml" feeling to it, IMO, to fill that niche.