One Way Open Is Not Enough
As Dave said, I believe that there is no viable "winner takes all" strategy on the web. The web is the winner that takes all. Anyone trying to get all the users on a single platform forgets that they already are.
So while I am thrilled that I can now get my Facebook status message into Twitter and subscribe to my friend’s Facebook posts in Google Reader, that’s not enough for my taste.
I want to use Twitter to update my Facebook status. I don’t update my Facebook status. I twitter it to my blog, my friends phones, and countless other places on the web. I hope that Facebook will be another of those places soon.