I received this yesterday:
Amazon.com: Acase Samsung Galaxy S3 Case - Superleggera PRO Dual Layer Protection (Black/Black) (Fits AT&T, Sprint, T-Mobile and Verizon): Cell Phones & Accessories
A few comments for those who are interested in it about things I was wondering before receiving the case:
The side buttons are covered by silicone, but because there seems to be a little bit of space under the silicone rather than resting directly on the button, it prevents accidental button presses I was worried about (and I like it even more because I was accidentally hitting the power button without a case). The silicone portion is a little bit of a dust/lint attractor, but not as terribly as some other silicone products I've seen. The polycarbonate portion of the case has the rubberized feel that so many other things are using these days. The cutout for the audio jack is maybe 1-2mm larger all around than than the jack itself, so I haven't had any problems plugging anything in so far.
My phone came today and I put the Superlegerra on it after receiving it last week, and it's a nice case. Well worth the $12. The rubber that covers the buttons is sweet. They push easy and are also easy to find without looking. I am as happy with this case as I thought I would be.