Social writing easy

I'm very much into social software and and just discovered the amazingly easy to use WRITELY. Basically, you sign up, upload or write up a document online with all the standard word processing tools and invite friends or colleagues to edit it. So instead of sending each other copies and endless updated versions of the same document, you only have one you work on that gets instantly updated everytime someone changes something.

If you often have to write and edit documents in a team (like i'm doing these days), this is the perfect tool. Try it!