How about...

Ruby is all of those cool languages that you've never had the time or
patience to learn, but in an easy to digest, logical, fun way.

You know, the languages that are as powerfull as C++ and Java, that
have all the neat features that the .Net folks act like are their
brand new inventions?  The stuff that your CS professors say, when you
master this, then you'll be ready.
Think: scheme, lisp, lau, smalltalk, oCamal, ObjectiveC, unlambda.

Ok I'm kidding about the unlambda part, and I'm kind of biased.