Not sure if you've already seen this, but Heroku announced support today for Scala: http://blog.heroku.com/archives/2011/10/3/scala/ .
Great article. I'm sure it won't be long til I start dabbling… :)
(btw I heard about Finagle:http://twitter.github.com/finagle/ through the article. also sounds like a really neat project, check it out.)