i'd like to look at this a little more in depth. the cost of carbon frames is falling. it's a capable material for touring. I'd like to address the advantages and disadvantages of touring on carbon, as well as potential mitigations for the weak points on carbon.. I got my chinese carbon cx frameset from a reputable seller with 2 yr warranty for around 500, which is pretty close to what one would pay for a surly, soma, and the like.

pros:
lightweight (on avg you save maybe 1 kg)
stiffer yet comfortable
costs are coming down, especially if you look at the open mold models from a reputable seller

cons:

1. no eyelets (need p clamps or something for the rack)
2. can't weld it like steel
3. low impact resistance
4. more theft prone
5. generally not designed for touring punishment

now to address the cons..

1. can p clamps provide enough support for a 30-40 lb loaded rack? furthermore, can a typical well built carbon seat stay handle the extra weight at the lower seat stay joints? (the answer varies with the build, so let's just make a sensible assumption that the frame is more a cx frame, and not a tarmac, cervelo, cannondale evo, or any of the race style bikes)
2. how common are frame damage in a given tour? where are the failures most common? (if it's bb, head tube, or dropouts, it's probably game over)
3. carbon fiber frames can be protected. people have used inner tubes, or other polymeric material that disperses the force. are these generally adequate to protect the carbon frame for a long tour?
4. I'm sure there are ways to make a carbon bike look ugly (eg. wrap it in inner tube)
5. I get it, Murphy's Law.. carbon fiber isn't designed to handle forces equally in all directions. but again, assume that it's a well built cx frame, not a superlight giant propel advanced sl... what are some specific touring scenarios where a carbon fiber frame would be at risk?