Bear in mind that once you've gained a certain amount of experience
you'll look at this bench and see many places where it could be
improved: dimensions tweaked (probably height), vise style or placement
changed, more customized for the kind of work you've come to do, or
where you just don't like the craftsmanship. In short, you probably
shouldn't go too nuts just now. That being said, here's a whole page
full of useful links:
http://www.geocities.com/plybench/bench.html