Most of the warnings about sharpening ceramic blades are far in excessive of how difficult it actually is to grind the material. While I would not want to actually profile a blank piece of ceramic into a knife, I have reground edges that had mm size pieces out of them, and tips that were broken ~0.5 cm back. This was using just a cheap AO belt on a 1" sander, nothing fancy. It takes longer than steel, but you can get it done.
That being said, while you can indeed sharpen it with most hones, as Bronco said Diamond abrasives will cut it with the most aggression, and if I was sharpening them by hand that is what I would use. You should be careful not to use excessive pressure as it will damage the hone. If you have to actually shape the edge because it is damaged I would recommend a large SiC waterstone and some 80 grit lapping compound, this will get you done in the most time.
I was not able to get the ceramic knives that I had anywhere near the sharpness of steel. I could however get them as sharp as ceramic knives I had seen NIB, and the owner was pleased with the edge. Based on some conversations I have had, ceramic may need a bit of a thicker edge to get a high sharpness because if you go to thin the edge breaks apart under sharpening, which is what I was seeing. You might also try a buffing wheel loaded with a fine SiC compound and CrO as a finisher.
I would be interested in what you come up with if you do decide to experiment.
-Cliff