Martín has released a super-cool Atom 1.0 parser in Ruby, hosted at RubyForge and available under an MIT license. It's a really good showcase of the flexibility of Ruby. Extending it is very easy. If you're into Ruby (or Atom :)) check it out, the extensibility mechanism he's put in place is quite something.

Apropos (?):

Professor Farnsworth: "Let me show you around. That's my lab table and this is my work stool and over there is my intergalactic spaceship. And here is where i keep assorted lengths of wire."
Fry: "Wow, a real live space ship!"
Farnsworth: "I designed it myself. Let me show some of the different lengths of wire I used."