Risks are as described, but many of the folks are ignoring the risks of pasteurized milk too. The worst milk contamination cases are not from raw milk but from big companies who do pasteurization so it's unfair to say that commercial heated milk is necessarily safe.

As to raw, know the farm you get it from. Show up unannounced and watch them milking, ease into is slowly. Lots of information on the benefits at eatwild.com including the scientific papers to back up the claims.