There's news doing the rounds today about, well, the title says it all really. But read the last paragraph of this article. (Thanks to @awolk) "It’s worth noting here that Nielsen is likely overstating the churn because it is only measuring visits to the Twitter.com URL. The majority of Twitter use happens away from the site, on mobile phones and apps like Tweetdeck, and it’s theoretically possible to never visit Twitter.com after you sign up." Twitter isn't really a website - it's more of a platform. As @faris tweeted, typo and all... "@awolk o yeah, cripes i forogt twitter had a website ;)" Sign up & have a go.