Ruby
Ruby looks wierd to a Pythonista. I want to find out what all the hubub is about. After a few months, I'm getting used to some of the sticky areas. When an idea comes to mind, I automatically think to write a quick Ruby script.
Many of my scripts require Ruby version 1.8 and above and RubyGems. Many use Hpricot to parse HTML data (web APIs and such).
Rails is sweet. Here's my first RoR app, a Delicious clone: Bookmarks.
