Only a matter of time before the adult industry catches on. The only downside is no way to get auto payments every month. I see camwithher.com just started accepting them yesterday. I'm very long term on bitcoins
Easiest way to buy them in the US is
http://coinbase.com link your bank account and buy them. Decently funded startup.
Just the black market alone has trillions of dollars worth of money floating around.