For me, there just doesn't seem to be enough public information to develop a closed opinion on the matter. I don't know that there will be any forthcoming either. I would imagine that a lot of that information is being kept close to the vest in the interest of Caster's private life (or whatever is left of it).
Did she receive hormone treatment? Is the IAAF going to monitor her testosterone levels, etc. if she continues to bring home gold? What exactly changed that seemingly put this issue to rest for the IAAF?
Without that info, I think that the attitude of the other female athletes, many of whom seem less than excited to race against her, is completely understandable. "The IAAF ruled her a she" is not going to be enough to render their personal opinions moot, and why should it be? As a lot of folks have already mentioned, the ambiguity of IAAF standards and complexity of Caster's gender, make it likely that IAAF would NOT want to get into a legal battle that they would be hard-pressed to win if they decided to block her from competition.
I think that it's a nice quality that Meadows displays, the readiness to protect someone who is being alienated, who cannot help physically being who they are and just wish to compete. Still, I think it is in poor taste for her to call out the other women publicly, making it seem as if their concerns and animosity towards the situation that has been created are out of petty jealousy and without a reasonable foundation. They've worked their entire lives to achieve at this level of competition, and have a small window to shine and make a living in the sport. Suddenly, a performer that outwardly looks more man than woman springs up, and she puts on a performance that leaves commentators and educated observers of the sport saying "something is very, very wrong here"... only to find out shortly thereafter that doctors in the athlete's own country called her gender into question and advised against letting her compete internationally. Of COURSE there is still frustration with the whole situation. I don't think that anything short of full access to the results of Caster's most recent gender tests would satisfy them fully, but we all know that would be a terrible thing to do to Caster, and that there is no way those will ever be made public.
Hopefully, the IAAF has made the right decision here, but something tells me we'll never fully know, and that come London 2012, a lot of Mid-D Female athletes are going to arrive and leave feeling cheated.