Tapulous, developer of the Tap Tap Revenge series of iPhone apps, is raking in $1m a month from sales through the App Store.

Over 20 million downloads have been recorded, with over 600 million games played. To say that Tapulous, with just 20 employees, has been buying in the luxury three-ply toilet paper for their office loo in recent months would be a total understatement. [Reuters]