If that tractor of Frank's will fit through a standard walk-gate, it just went on my list of coolest tools ever!
But I'll just have to settle for my "Tractor Scoot" (That same tractor seat from Gardeners Supply that others have mentioned). That is such a comfortable way to weed! I have a clamp on umbrella, but still need to figure out a way to attach it. I tried sticking it in a piece of tubing in a pot of dirt and setting that in the basket, but it kept tipping over. I WILL figure out a way for next year!