When creating Twitter analytics reports I always record where clients Twitter followers are located. I also like to supply the client with an interactive Twitter follower map. This helps us to measure and evaluate the reach of their tweets.
Below are two snapshots of where my Twitter followers are located.
Above is a video highlighting the Pope's recent speech about how the Church needs to use new platforms to engage with today's audiences. Below is a screen shot of the Christian social networking site XT3. XT3 state to be... "so good even the Pope uses it". I will let you create an account and let me know :)