it's funny you mention because I believe I have cracked the problem of pinning an altcoin to the usd but I fail to see how it would get adoption in the first place. There is no deflationary or early-adopter reward in it, the only value would be that the coins in the system would be transferrable with no transaction fee and that they won't lose value relative to the USD so it is safe to keep them in their digital form.
I reckon these are the same problems Paypal faced early on. Why take good old USD out of your bank account and put them into an account you can only use for certain payment processing? They figured it out, but maybe it's too late now? I'd like to think it isn't
