i wonder if your problem was a one-time-thing type of deal... did you talk with surly at all about the hub? i use their hubs on the track, and i'm a hefty guy myself (somewhere around 200 i'd guess). the last thing i need is to take down the pack because my hubs failed. i could care less if i go down, but i'd rather not take anyone else with me.
your story sounds more like it was just a wheel that was built up poorly rather than a faulty hub. that's somewhat reassuring.