App-engine and Scala

Question

Hello, all.

I have a 2-part question:

1. Could you use Scala with Google's App Engine instead of Java?
2. (Assuming 1 is answered yes) Would it be advised?

Thanks

Answer 1

http://www.scala-lang.org/node/1831

Answer 2

Here, my app: NSMatic

As to the 2nd question... I don't know why it just wouldn't be advised.