Twitter having released their own tweet button means that the retweet button provided by tweetmeme.com is fast becoming an endangered species. You can see on a hourly basis, websites removing the lime green button for the sky blue one. But all is not lost, as Tweetmeme (By the way, we say "tweet me me" but have heard people call it "tweet meem", which is correct?) are about to release Datasift, which promises to be something pretty clever. Rather than explain it, please watch the video below. If you're interested, we'd recommend getting yourself signed up for the alpha programme at http://datasift.net.