i third the anti-balance.
professional road racer's don't need it, neither do we.
i used to work in a hi-pro tire shop (for cars) and spent a lot of time figuring out the physics of tire balancing, matching, etc.
the harmonics that cause an out of balance wheel, be it a car, truck, motorcycle, or bicycle, are most prevelant around 33mph (to about 40) and 66 mph (to about 70) and about 120mph, but we don't need to be concerned about those type of speeds. ask anyone with a shaky car what speeds it starts and stops at and they'll tell you.
most people's bikes don't go much over thirty, and if they do, the vibrations from the engine, tires and bike itself will cancel out any effect wheel balancing could have.
the best thing is to build a solid bike, keep your wheels true and greased, tires inflated where they're comfortable for you.
BUT, one thing you can do with your wheels and tires, is match them. this involves finding the heavy spot on your rim and the heavy spot on your tire and putting them opposite of each other.
also, a lot of bicycle tires aren't truly round. if you have a high spot in the tire and your rim's got a high spot too,put those opposite of each other.
or, if you wanna get really into it, you can true the wheel to the tire, by intentionally putting a "hop" in the wheel where the low spot of the tire is.
and finally, if you do waste, i mean, spend your time to balance your wheels, don't do a big skid, run over mud or gum, or patch your tubes.