I love Heroku's little "language and community" section of these articles when they add a new supported platform. For example, the link to the explanation of Scala's Hindley-Milner type inference method (http://www.codecommit.com/blog/scala/what-is-hindley-milner-...) definitely taught me something new about the internals of Scala, and in general a new topic in Computer Science.
Congrats on shipping yet another supported platform!
Minor correction - Scala does not have the Hindley-Milner type inference method and for technical reasons it would be very hard to have something similar. Languages that do have Hindley-Milner are those from the ML family, like Ocaml, Haskell and F#.
The codecommit article is a good intro to H-M as in Haskell, OCaml, F#, SML (AKA Damas-Milner by at least one dev I respect), here is codecomit guy re: why Scala can't use HM / DM, rather, Scala is flow-based, or "local type inference".
Oops, thanks for correcting me. I think the original article claimed it did use it, or at least something very similar - it looks like Herkou has tweaked their article and pulled that link.
Congrats on shipping yet another supported platform!