I have one of those Minoura stands from Nashbar, they're on sale right now for $40, I think mine was $50 but it was a christmas gift.
I highly recommend it for a cheaper stand. I have built two wheels on it, and never wished I had a more advanced stand. It comes with a doodad to center the feelers etc. etc., and the base has slots for mounting it, although I never did so I could pop in a movie while truing - something that I found makes the hour or two spent on truing and tensioning go by pretty quickly.
I'm probably not going to build every wheel I ever own, but being able to do something with really sweet hub and/or rim lying around is just awesome. Plus it opens up a whole new realm of purchasing options - sometimes you can find really cool unlaced hubs on ebay for cheap.
I also feel that being able to build and true your own wheels takes you one step closer to absolute self-sufficiency with your bicycle.

edit: here's the stand: http://www.nashbar.com/profile.cfm?c...eid=&pagename=