Twitter has hired Dick Costello, former Google executive and FeedBurner founder, as their new COO. Costello left Google in July.
As digiday notes: "The move is definitely a case of six degrees no longer separated. Union Square Ventures, a key investor in Twitter, also originally funded Feedburner before it was acquired by Google in 2007. And Costolo himself was an early investor in Twitter."
With his experience at Feedburner and Google, Costello definitely is a great addition to the rapidly expanding Twitter.