Has anyone had success developing a substantial Android app in Scala? Is it a viable option yet? Are there any mature development environments? Given the state of the Scala Eclipse plug-in, it looks as if there is no good IDE support at all other than possibly IntelliJ Ultimate.
A few people have posted tutorials describing how to fudge Eclipse ADT to sort-of support Scala, and how to to slim the Scala libraries using Proguard, but beyond that there has been worryingly little discussion about this topic.