Cantilever Brakes - Cyclocross I've recently purchased a Cyclocross bike that's been great so far.  I use it to commute and race.  However, I don't find the cantilever brakes that came with it satisfactory.  I'd like to switch them out, but am not sure which would be best for what I do.  Right now I have Tektro CR720 Retro-Style Cantilevers.  They don't seem to have much stopping power.  

Any recommendations on an upgraded brake.  I'll stay with the cantilever, but need something with more stopping power?  Might I just need to switch out the pads?  

Any input would be appreciated.
Well configured cantilever brakes should give you good stopping power. Start by making sure that the braking surface and the surface of the pads are clean. You can clean the braking surface with steel wool, and the pads should just need to be roughed up with a coarse sand paper.

Make sure that your pads aren't below the minimum wear line.

Cantilever pads are harder to adjust than most other kinds of bicycle brake pad, but the principle is the same. The pads should rest one or two millimeters from the rim when not engaged. See here for a better run-down on how to adjust them than I could supply:
http://sheldonbrown.com/canti-trad.html