Number of sides control for sphere, cylinder and tori

I would like to see yet another control added for the number of sides/spans on a cylinder, sphere etc. With a sides control I could create a stop sign with a single prim (excluding the stand), etc. Or bolts, etc etc etc. There are a miriad of other uses for these and further more we can actually reduce the number of polys to create the simple shapes we currently have to add more polys to create. It would be good.