Legit is really new, I'm impressed how fast it's spreading. I heard about it like 2 days ago and I don't think it even existed a month ago. Admittedly it's a pretty funny idea.
Marco Alka asked a while ago about code that's valid in multiple languages, I guess Legit and whitespace would be easy ones to make compatible with any normal language! (Technically he asked about 'files' though...)