Interesting languages not on the list:

* io : http://www.iolanguage.com

      Clean, minimalistic, prototype based OO.

* Reia : http://wiki.reia-lang.org

       Ruby-like syntax on Erlang's VM

* Curry : http://www-ps.informatik.uni-kiel.de/currywiki

      Functional logic language :  Prolog+Haskell.

* Oz/Mozart : http://www.mozart-oz.org

      Multi-multi paradigm language, includes constraint based programming.

Some of them are not necessarily up-and-coming but rather out-and-going. Oz is interesting, but it seems to be dying. Some like Reia are making slow progress. Curry is more of an academic language. io is probably the most up-and-coming so to speak.