From the FAQ:
> What is io.js?
> io.js is a JavaScript platform that is compatable with Node.js & npm.
What does that even mean?
Edit: Thanks for those answering. I started figuring out what it was, but sometimes folks really need to learn that "A correct definition" is not the same as "a useful definition". However, if it's as cool as described, definitely might give it a shot.
Edit2: Is this expected to be as stable as Node.js consistently? And how solid is the upgrade path- is it going to be a pain upgrading between versions the way Node used to be, or is there a smoother upgrade process? I guess what I'm wondering is, do I get any benefit from using this right now, or would it be smart to still wait for whatever version they consider release quality?