People may be interested in this:
Allows people in US to hedge against fuel, houseprices increases etc.
I don't know how popular it is, or if it will be / already is a serious financial market.
It could be a very innovative market, allowing the market value of real estate to be more readily valued (reducing chances of excessive bubble) - by improving liquidity.
Alternatively, if this market goes big time and large players start using "risk free" dynamic hedging, it will exaserbate the buble rise and fall (ala 1987)
Edit: actually, maybe this is nothing new. Done in UK too.