That’s very clever. Satoshi has implied that there is great flexibility in the way transactions could work: topic 195 I think he may have had such ideas in mind.
In time, hopefully, numerous such arrangements can be used to fully develop the idea of ‘smart’ contracts (http://en.wikipedia.org/wiki/Smart_contracts). The current Bitcoin implementation already represents a working example of smart contracts: software encoded rules governing digital property. Rothbard in Ethics of Liberty talks about how powerful the simple penal bond was to medieval commerce (http://mises.org/rothbard/ethics/nineteen.asp). Given the right contract tools, the Bitcoin economy will be able to flourish without relying on the expense and ethical contradictions of state courts.
XC