I just came across another promising toothpaste brand:  Urtekram.  The products appear to be detergent-free, sorbitol-free, and organic.  They make a children’s toothpaste!  Tragically, I can’t seem to find a source in the US for less than $10 a tube, so I guess I won’t be rating it myself anytime soon.  However, it appears to be more reasonably priced in Europe.