More and more sites are replacing their Digg buttons with TweetMeme buttons. Digg has also taken away many of their "social uses" to collaborate with other diggers over the past 12 months. I think that Digg will see a big 30-50% drop with traffic in 2010 due to the rise of TweetMeme.
In less than a year, TweetMeme has gone from a few thousand visitors a month to almost 5 million.
Take a look at the Quantcast numbers
since June 2009 below.
What do you think and when did you first hear about TweetMeme?