With the lasting economic crisis, in Europe and the rest of the world, the focus on alternative currencies seems to have increased. For example the Wall Street Journal has covered extensively the development of such currencies in Spain:
Another famous example is the Brixton pound.
At the same the dramatic reduction in IT development and infrastructure costs powered by open source technology and cloud services has allowed an explosion of alternative digital currencies. From Time Banks to Reputation Currencies to new currency systems such as Bitcoin, via other solutions like Clearbon, Kurrenci. The lowering base cost of the digital economy is affecting digital currencies as well.