I've been a long-term Twitter skeptic.
I think it's value-negative, and of total irrelevance to anyone outside an unholy alliance of geeks, narcissists (politicians, celebrities etc), marketeers, "media" and their drone-like followers. It's mostly used by lazy journalists and broadcasters, as far as I can see.
I highlighted it as one of my "zeros" in my predictions for 2010.
So, it's edifying to see that the "growth" stats are proving my point for me.
The appearance of incredibly annoying floating Twitter buttons on some websites is a sign of desperation - and is hugely counter-productive, as visual spam of that sort is a great way to alienate people.
About time to swap the silly bird logo for a dodo, methinks.