I was speaking with Marware last week about the availability of that case, and they mentioned that they had to go back to manufacturing and re-do the cases to fix the flash hole. I guess it looks like the new ones are shipping now.
I should have one of those cases within a week or so and I plan on doing a full video / forum review once I get it. I'll let you know!
I just got mine. I ordered the black MicroShell. It's glossy plastic, and the build quality isn't what I was expecting for a $27 case. The recesses for the volume and silent buttons are a little too deep, but it does fit fairly snugly.
The main reason I got it was that it covered up the Apple logo. It does this quite well.