Update: I'm still waiting to hear from Trek. I've spoken to the guy at the LBS and he was hoping to hear from them today.

Meanwhile, there is this article on repairing damaged carbon frames and components from velonews.com, which discusses various companies in the US, UK and Australia that do repairs.

http://velonews.competitor.com/2011/...rames_196178/1

I finally managed to get out and ride the mountain bike yesterday. I took it to ride on the canal towpath last weekend (at Great Falls, Maryland), but discovered a big spot on the side of the rear tire that looked like massive failure was imminent. So I put the bike back in the car and spent a few hours hiking instead.

A couple of days later I went to the LBS and got new tires. They're designated "light trail," for use on easy dry single track, fireroads, and even pavement, but are not good for technical single track because they're not very knobby. I figured they would work for my current situation. So I put the new tires on the wheels along with new tubes, and the next day found that one of them had gone flat due to a defective valve. Good thing I had just bought some additional spare tubes.

After all this, I figured my best bet would be to ride on the paved trail near the LBS, so that I would be able to quickly6 resolve any additonal mechanical issues that might crop up. So that's what I did yesterday. I was also curious to see how fast the light trail tires could go on pavement. Pretty fast, as it turned out -- I averaged 14 mph over 36 miles, which is not much slower than my road bike.

The trail I rode yesterday (WOD) has a dirt path running parallel to much of it. I think it will make a nice change of pace to ride the mountain bike on it, especially in colder weather when I won't be doing such long rides. And I would like to get back to the towpath.

Still, I really would like to get an answer from Trek.