I tried out the Cruzer case, at joelmic24's request. As the review linked to above says, it's high quality, scratch resistant polyurethane - pretty sturdy. I've kept my phone in my pocket with keys, thrown it into a gym bag with all kinds of stuff, and no scratches appear on it. It's a one-piece case with a very firm fit, that doesn't add much bulk to the phone. The surface is glossy and smooth, but they seem to have found the right balance between being smooth enough to pull out of your pocket without turning your pants inside out vs. so smooth you can't hold on to it. In fact, it has a really nice feel to it.
It fits into all docks I tried (car dock and standard dock), as well as my TuneBelt Armband (it actually slips into the armband easier than my phone does with the Incipio Feather case). The issue I had with the Incipio Silicrylic case not always detecting it was in a dock does not occur with the Cruzer. All necessary ports/inputs are open but still protected - the Cruzer feels like it offers better protection than the Incipio Feather.
I've gotten several comments on the Android design as well - ranging from 'How cute!' from my girlfriend to 'Cool - what is it?' from a luddite friend. If you check out the review above or look at it on Amazon, there are several colors available - I have the white, but I think the orange is pretty cool... At any rate, this is a nice, fun, inexpensive case that provides a pretty good degree of protection. I like the sleek look of the Incipio Feather, but I'm having a hard time deciding which case to keep on my phone... maybe I'll switch back and forth depending on my mood. Pics below: