I have to say that while I don’t normally go for something that will make my phone bulkier, Scott Wilson’s kickstarter project TAKTIK: Premium Protection System for the iPhone not only looks super-cool, but looks like it could protect your phone from being run over by a tank.
The only thing I don’t like about these cases is that they cover up all the ports, making use with accessories harder, but that looks like the price you pay for this sort of high end protection. Looks like a great product for people who spend their days not in front of a keyboard and monitor, but actually out and about.