Don't know if this was ever discussed in a previous post, so being a bit lazy tonight I won't look it up, I'll just post it. There are many variations here, this one caught my eye. I like acrylic, you can see all the moving parts.

http://www.potomacdisplay.com/pd_catalog.cgi?dct=on&tt=852

Ooh, thanks for the link! They have some basic rectangular "test tube rack" display cases that look perfect. I'm going to order a couple and I'll post a review here when I get them.