Check out nowjs[1]. It's not quite what you want, but I think it's in the same spirit. I haven't used it personally, but I've heard only good things about it.

Check out nowjs[1]. It's not quite what you want, but I think it's in the same spirit. I haven't used it personally, but I've heard only good things about it. [1]: http://nowjs.com/ http://nowjs.com/ I'm not sure that it lets you share code between sever and client entirely seamlessly (it might--I honestly don't know), but it has another advantage: it lets you share objects between different clients seamlessly.