I've had a look at Scala, but not so much as to actually start writing code. But it does look promising. http://macstrac.blogspot.com/2009/04/scala-as-long-ter

I've had a look at Scala, but not so much as to actually start writing code. But it does look promising. http://macstrac.blogspot.com/2009/04/scala-as-long-term-replacement-for.html http://macstrac.blogspot.com/2009/04/scala-as-long-term-repl... The thing which appeals about Duby is that it uses the underlying Java typesystem, and doesn't have a runtime library. If it ever gets finished, it can be as fast as any Java code, and there's been a lot of effort put into making Java code fast.