I was explaining Bitshares to a finance professor the other day and when i described the market pegged assets he got excited and asked if there was a bitOIL. i also think it'd be an excellent idea, but i'm agnostic at the moment as to whether we have sufficient liquidity in the system to make it worthwhile. At some point, it'd be assets that like that could bring in more traders, so if we could pull it off, then it'd add another nice feature to our system.