Q Coin Currency

"QQ Messenger is the most widely used IM system on the planet despite being predominantly Chinese." It has its own currency, Q Coin. This is becoming so popular that the Chinese government considered capital controls on Q Coin to stop them reducing the value of the RMB. But these merely created scarcity and drove up the price.

Source: Brett King, Bank 2.0, p 333. Also mentioned on Wikipedia:

http://en.wikipedia.org/wiki/Tencent_QQ#Q_coin

Prototyping a Phone System

Brett King points out that you can prototype and IVR using index cards to lay out the menu. Users can then try to complete a task while someone reads out the prompts.

This can be used to test the 'champion' current system against a 'challenger' new system.

Source: Bank 2.0 book, page 125