Along with figuring out the brakes, you'd also need to get a road-compatible front derailer, which has a different cable-pull ratio than mtb front derailers.
Originally Posted by robo
I think a lot of touring bikes still use cantis because they are 'classic'.. Maybe something to do with fender clearance also, but i sort of doubt it (considering that you have fenders on there, with V-brakes).
That's one possible reason. Another is that only Dia-Compe makes a road brake lever that is compatible with V-brakes, whereas cantilevers are compatible with standard road brake levers (including STI levers) as has already been mentioned.