Google Ventures and China-based IDG Capital Partners place a bet on OpenCoin, the company behind Bitcoin exchange Ripple.
Amazon has handed 500 "Amazon Coins" to each of its US-based Kindle Fire customers.
Bitcoin isn't the only form of electronic money being mined, traded and spent these days.
A CoinDesk Q&A with Stan Stalnaker, founder of Hub Culture and the Ven digital currency.
Amazon is set to launch its own in-house currency -- Amazon Coin -- this month.
Bitcoin's long-term chances of success are better if there are many other alternative, digital currencies, with many businesses investing in them.
Amazon is launching its own currency later this month. Amazon Coins will only be exchangeable for Kindle applications and games and initially US only.
Giant bitcoin exchange Mt. Gox has delayed plans to support the litecoin cryptocurrency, following another DDoS attack last month.
The feathercoin cryptocurrency, which uses a mining technique similar to litecoin's, is enjoying a rapid adoption among Ecoin fans.
Take it as a sign of bitcoin's growing mainstream visibility: other alternative currencies are being branded with the label the "anti-bitcoin."…