In our initial Twitter report published last June, one of the areas that looked at were the countries and cities where Twitter was being used. Not surprisingly, nearly two-thirds of unique users (62.1%) were located in the U.S., while the U.K. and Canada were a distant second and third.

Given how Twitter has much grown over the past six months, we wanted to take a fresh look at global usage to see if there were any major changes. To gather this insight, we looked at our entire twitter repository between mid-October to mid-December, 2009. We aimed to understand twitting activity both in terms of the country/city of origin of each twitter but also in terms of overall twitting activity (how frequently they tweet).