Learning a language, not completely mastering it, as others have said here, that was the goal. The goal at the 43things website.
In the process of getting to know more about Ruby, I have bumped into people with the same ambition, started a club, and generally got more goals (learn FreeBSD to be able to serve Ruby on Rails, learn Haskell – to see really functional programm, learn more Lisp – just to see if I can do it, &c). It’s been educational.
Next up: Getting to know Ruby’s internals more closely. I intend to snuff up some C to get that more… natural.