Since we're covering a lot of topics on BB7s I've got a question for the crowd:I commute year round in Seattle, and put a cyclocross fork w/ BB7s on my road bike. Huge improvement in the winter, it's really no contest. My rims get covered with a fine abrasive paste, and while I can scrub it off by tapping a rim brake repeatedly sometimes I need my brakes NOW not in 20 sec.Anyway, today we had a rare sunny day. I went for a ride and was coming down a 1200 foot hill with grades 14-20%. The brakes felt fine the whole time, but 2/3 way down I got nervous, pulled over and sprayed a little water on the (stock) disc. The water instantly turned to steam. So my question is, how much heat can these things take? Do they fail catastrophically or do you get some warning? It would have really sucked to lose brakes on this descent.