I read there is a great demand for them. Research performed by the Bureau of Labor Statistics shows that over the next few years, the demand for phlebotomists surpasses the applicants. Yes, it sounds like a good field to get into if blood doesn't bother you.
It is very risky because your constantly drawing blood and are at an even high risk for pokes then nurses are. Sometimes it is well compensated other times it isn't. I cant stand blood it wouldn't be for me either.