Just an update to my earlier post reviewing the Zune 4/8 crystal case...
http://www.zuneboards.com/forums/213714-post26.html
I found that, on the back of the case near the bottom, there is a spot to attach the wrist strap. Though the case does not have an opening where the wrist strap attachment is on the Zune device, there is an attachment area. I don't use it, but it is nice to know there is a spot. Therefore, the only negative point this case has is the inability to control the hold switch.