This visualization challenges the claim that Yahoo! mail has a very strong user base in Asia. The volume of email delivered in Asia, Australia, South America and Africa looks negligible compared to the volume delivered in the USA. Email volume is an indirect indicator of users, but it is a good indicator of "usage" - spam or otherwise. It's not a stretch that there wouldn't be usage without users, ergo "indirect".

If I were a number of the Yahoo! mail BizDev or Accounts teams, I would ramp up my marketing efforts in the areas that are sans bubbles on this visualization. This is a great tool for marketing and marketers (of the service) alike. Kudos to Yahoo! for making it without Flash.

Well the eastern states are (Sydney/Melbourne), Western Australia hasn't pinged once it seems..

Neither is Africa or South America.

Neither Singapore.