These kind of questions are of the same flavour as 'should professional athletes be participating in the Olympics?'

The answer is what does the league/organization claim? Is the PGA the best men, or the best club swinging humans? Are the Olympics the best amateurs, or the best in the world?

So then, assuming that each sport is about the best human playing, then we need to dismantle the LPGA, the WNBA and any other 'womens' league, and we need to integrate the women into our existing leagues - both at the pro level and farm team/qualifying level as required by ability.

However, back in the real world, the discriminating, sexist, racist real world, women competing in mens' leagues are merely novelties at this point (Hayley Wickenheiser, Michelle and Annika, Manon Rheaume). While they are good enough to play with the bulk of their male contemporaries, as Gord has pointed out, they are not superstar ready or capable. I don't think Michelle or Annika would be in the top 10 in the PGA, just as Wickenheiser isn't lighting the lamp as often as the top 10 scorers in Europe.

But the question, I guess, is SHOULD she be playing? And so my answer is if she chooses to, and the PGA chooses to allow her, yes.