Scalable framework for web apps?
jrockway: You might want to revise your choice of languages.  Common Lisp is as expressive as Python or Ruby, but many times faster.  Haskell and OCaml are even better.Clojure is another option; theoretically you have all of Java's web frameworks, and Java is also faster than Python or Ruby.  I can't recommend it, since I haven't used it yet, though.  (I don't want to be a Clojure fanboi ;)