I'm using Cremax ICYDock MB123AK IDE mobile racks. These are the ones Tom used in the prebuilt IDE systems. I've had my server for a little over a year and I haven't had any problems with them. For SATA systems he used ICYDock MB123SK-1B.
Here's a link to the IDE rack:
http://www.newegg.com/Product/Product.asp?Item=N82E16817186004
See the comment from limetech on this page:
http://www.lime-technology.com/wordpress/?page_id=24