A little bit of my research on a complementary currency to the Euro:

E-coin – an evolution for Euro? (presentation)

http://bit.ly /Ecoin-eng

Conference in Spain: (there is a problem with the transmition in the begining)

http://www.wiziq.com/online-class/910186-e-coin-una-evoluci%C3%B3n-al-euro

Some of the features are:

- "Peaceful" coexistence with the existing monetary and banking systems (as it does not replace but complements it).

- It is easily and rapidly deployable through a multi-currency card 

- Facilitates the inclusion of so-called "intangible assets" in the economy

- Speeds up the money's circulation in the economy

- Activates the economy through the monetization of surplus

- Brings transparency to the money’s circulation (tracking)

- Reduces tax evasion

- Changes the currency trading value: from fixed value to real-time (dynamic) value.

- Provides facilities for the negotiation of bad assets and real estate bubbles, reducing the fragility of the banking system

- It gives advantages for the marketing of existing production, avoiding the generation of surplus (waste), sustainable effect

- Increases the population’s purchasing power without requiring a prior economic growth

- Increases buying interest for long-term government bonds