“Last week, the market share of visits to Twitter surpassed Digg for the first time since launch and was ranked #84 (one above Digg at #85) in the Computers and Internet category. A big driver of traffic to Twitter last week was around the US Airways plane crash in to the Hudson River last Thursday, driving many posts and updates about the situation. One photo of the plane taken by Janis Krums, was viewed by many people via Twitter and was subsequently used across a number of traditional media outlets.”
via Hitwise Intelligence

Also UK Internet traffic to the site has increased 10-fold over past last 12 months. For the week ending 17/01/09 twitter ranked as the 291st most visited website in the UK, up from a ranking of 2,953 for the week ending 19/01/08. UK Internet traffic to the website has increased by 974% over this period.

Good steps twitter, go further ..