Granted, most of you guys on here are out west, where mud isn't an object. But, here on the east coast, the old standard Tall-Skinny is the 34x10.50 Interco Super Swamper LTB. I've driven vehicles with these tires, and while they excel off-road, IMO they're horrendous on the street.
I'm more of a rocks and dirt kinda guy than mud and swamps anyways, which is why I enjoyed wheeling out in Arizona so much more than I do here. Does give another option in the Tall-Skinny tire class though.
I had also been looking at "tall" skinny tires to run on the street for my truck, to help with gas mileage and all of that. I found what I thought would be the perfect size, a 235/85R16, which equates to a 32x9.3X16" tire. I've got a mild suspension lift on my truck, and the 32s fit perfectly in the wheel wells, and with a 32" diameter tire, my odometer and speedometer are actually nearly dead on accurate. However, I've been unable to find any tires in this size that are less than a Load Range E. Since these will be street only tires, and will not be used to haul very heavy loads, and possibly rare towing, I'd rather stick with a load range D tire, for the sake of comfort on the street. If anyone knows of a Mild All-Terrain tire in that size available in Load Range D, please let me know.