I often like to make snide remarks at Python and Ruby, because ... well, because they're not Lisp.
To offset this a bit I'd like to say what I find good and impressive about them:
Python seems to be a great language for describing algorithms. For example, Kragen's hacks abound with samples of Python code that is simply wonderful to read, and seems like exactly the way to go.
Ruby is to be congratulated for demonstrating once and for all that dynamically-typed, semi-functional, object-oriented programming is a fun and useful paradigm for systems scripting.