[tych0]

I was afraid of this too, so I just bought an unfinished door from home depot (for $22 oddly enough), and some crappy filing cabinets from the local university that were the right height. Set door on filing cabinets => done. I could bolt the door to the filing cabinets if I really wanted to, but it's stable enough as is.

The other advantage of using a door is that they come in various sizes (both width and height), so you can get one that matches your workspace size. You can also stain them some cool color or buy some fancy wood grain if you're into that sort of thing.