On One Pompino owners...

I destroyed two WI hubs last 'cross season. They are rebuildable if you can find parts (and replacements aren't cheap). If I was to build a SSCX bike again I'd try and find some kind of compatible single speed cassette hub. Not just because of issues with mud but also because it's easier to change your gear ratio, which is nice given the variety of courses and mud around.

This.