Twitter statistics: Avg. number of follower by time zone

About a week ago I saw this post on TechCrunch and I wondered what other irrelevant statistics I can find on Twitter (given the fact I've already put some time in collecting and parsing Twitter data).

Here is the number of followers by time zone settings (removed time zones with less than 10,000 users, sorry Sydney).

Minimal analysis:

• Greenland - More people set their time zone to Greenland than the population there...
  
• Alska - Over 6% (!) of the population are tweeting [see also - 'Greenland'].
  
• Tokyo - Don't set your time zone to Tokyo if you want people to listen to you, lot's of people are tweeting from Tokyo but no one listens.
• No Time Zone - There's a very low followers count for people with no time zone setting - I guess the reason is that those people are new to Twitter or just don't care enough (those people are about 20% of this entire sample).
  

Data collected from the Twitter Sampling API, March 21st-25th, 2010.
Total number of users visible during that time frame: 2.5M (which is a very nice sample).