Nature on Facebook
Anyway, it's splendid because it's a chance to interact with NPGers on an informal level - or rather a chance for us to interact with students & scientists on an informal level. The group started out as a mini-project run by a couple of Facebook early adopters and while it has picked up a lot of advice and support from within the company since then it's still a friendly place where everybody knows your name*.
Some of that company support has come in the form of free Nature-header-red iPods, so sign up and keep an eye out for giveaways in the near future.
(if you haven't seen it already you should also check out the PLoS group. After you've joined the Nature one, of course).
* though it's not the right place for ask the editor type questions
