I've been using a Speck case for my Zune 80 for last few weeks, and I'm not really impressed. The case is constructed from a silicone that reminds me of the stuff that they use for the seal on a scuba diving mask. While it's certainly durable, the downside is that in winter, it acts a dust magnet.
Getting the Zune 80 into the case was simple enough. I first placed it in, down side first. The Speck case has special areas where the silicone thins for the Zunepad and the buttons. The trouble came in when it was time to insert the included plastic screen cover. The benefit is that Zune is now completely isolated and protected, but as you'll see from the images below, despite my best efforts, it hardly looked real good doing it, and the silicone failed to form a solid gasket around the screen cover.
On the rear is a plastic button. To that attaches a removable belt clip. Unlike some other cases, the clip is plenty secure, and didn't fall off during testing. I also appreciate that access to the ports and hold button is preserved with appropriately placed cutouts.
I think that this product has some room for improvement. For starters, I'll ditch the plastic screen cover. After that, I'm contemplating taking an X-Acto knife to the Zunepad cutout as while I can scroll, it does slow me down as the silicone is not as frictionless. I'll think of it as Speck case 2.0.