The more I think of it, what has been done in FairCoin is an address swapping mechanism, they use http://wafflepool.com/ (witch pays in BTC). So if you swap the HBN address for a BTC address and use wafflepool's infrastructure, then when the amount of BTC is big enough, you buy HBN and then distribute it back to the matching HBN address.

I think it's brilliant and could be done fairly quickly.  at least it could be a start.