I found this thread over at Treehugger today about ditching hair products. Given that I've only just shaved off the last vestiges of my long hair, I might give it a try. The sides are now about a quarter inch with an inch long on top. I've never washed my hair more than once every couple of days, and it always looks better on the second day, once the natural oils have had a chance to replenish.
It may be time to give up the consumerist myth that I 'need' to use hair products at all.