I also like their "Flip-Lid" idea -- the front of the case is retained by magnets, and can be "flipped" to the back of the case for storage while you use the iPhone. It's a neat way to keep the front covered without that awkward flap that some cases use.
My iPhone is currently sitting in an iSkin Revo (I like how thin and tough it is, even though it grabs lint from my pocket like crazy), and my iPod is in an awesome leather Vaja case. However, if I ever picked up an iPod touch for using around the house, I'd definitely consider this -- at $99US it's a bit pricey, but for a custom-built case that adds rugged style to your iPhone, it's worth checking out.
Special note: next week TUAW will be giving away 5 of these. Each case is a custom order, so winners will be able to customize the case before they receive them. - Ed.