For serious use: scala/lift, clojure (and learning java through those 2!) erlang, perl (yes, perl, I never used moose before) ----------- Will get serious a

For serious use: scala/lift, clojure (and learning java through those 2!) erlang, perl (yes, perl, I never used moose before) ----------- Will get serious at some point: objective-C, OCaml, haskell, F# (when i get VS2010 license)