Pipe Workbench: 2010 - ThinkGeek
This was a quickie project to make more work-space in my office shop. It's super-fast, heavy, indestructible, comparatively cheap, & requires almost no tools. You take a full sheet of plywood & have the lumberyard chop 2' off the end and split the remaining 4x6' section down the middle. This gives you a double-thickness work surface & lower storage area. The rest of the parts are mostly off the shelf 1 1/4" black pipe parts. You'll need to get custom lengths if you need a specific working height.