I'm a little late to the discussion here, but my wife has convinced me to try something different this year in our garden. Last fall I made a "Chicken Tractor". It's a small chicken coop on wheels with no floor. I've made it narrow enough that it can fit in between garden rows if I plant the rows just a little far apart.
We'll put a few of my wife's chickens in it and move it every day. The theory is that the chickens weed, feed, and till the soil as they go. It's supposed to save on chicken feed too.
I don't know how well it will work, but it has to beat crawling around picking the weeds by hand.