This topic has also recently come up again on the forestryforum.com side in the timberframe/log building forum. If you go there you can see some other options too.
http://www.forestryforum.com/board/index.php/topic,34541.0.html
I built Timber Ponies instead of saw horses. Smaller, lighter, easier to move, made from dimentional lumber and plywood, and store easier. Both ponies and saw horses have their benefits though. Check out some of the designs. Jim even included PDF dimentioned drawings of his design. Horses can be good practice for the novice as a first project.
