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BlackCoin

Blackcoin is a scrypt based coin launched on February 24th. It boasts 10 second transaction times (very fast), and unlike most other coins, can't be mined anymore. It has entered a full Proof-of-Stake mechanism, making it very energy efficient and allowing for 1% annual interest rate to anyone holding BlackCoins in its wallet. It will soon be accepted by Coinkite (along with BTC and LTC), allowing the currency to be used a multiple retail locations. And is already accepted by many online retailers and markets.