I did a post on my other blog (accidentally placing it there instead of here) about the "icky" connection between the new Office online and Facebook--you have to connect with a Facebook account to use the product.
"Icky" is the word to use with Facebook--such creepy, uncomfortable associations now with the ad nauseum talked about violations of privacy trust. The connection to Office online--such a brilliantly executed product...its a little like being in the presence of a beautiful human being and seeing that person pawed by some disreputable character. Icky!
But try to avert your eyes from the strange gentleman off to the side that is 20 something year-old Facebook and engage with the beauty that is an amazing Azure development project in Office online: http://www.docs.com.