By the way the majority of devcoins are essentially mined by human creative work: 180M coins were distributed to people who earned shares for developing open source software, completing bounties, writing on devtome, which pays 1 share for between 700 and 2000 words according to writer's quality.  The number of shares acts as the effective difficulty in earning devcoins, which is getting harder and harder (just like bitcoin mining). The coin has been around for more than 2 years but devtome is a fairly recent addition.