Surly has somebody pushing the limits and cheating death on the new Pugsley:

This September, Jacob plans to ride 2,000 km by himself, unsupported, without sag wagons or food/water dropoffs! This can only be done by travelling from watering hole to watering hole in the springtime. His mode of transportation will be the Surly Pugsley frameset with Large Marge rims and Endomorph tires. He’s also having a local craftsman build a custom trailer to fit around the Endomorph tire. That should be really cool.