The gas station down at the corner from my office has a sign on the counter that they take these notes, which I assume means that they will give me $10 in gas if I give them one. I just wish they'd give me the same in gas for a silver round!
Alternative currencies like this will be novelties unless and until the Fed creates a hyperinflationary environment like 1923 Germany. Then people will be more than happy to trade in hard currency. In fact, evidence suggests that even mild bouts of hyperinflation, or consistent long-term debasement of currency will prompt people to demand hard currency, similar to what is happening in Mexico today.