No- I wouldn't be worried-she has been tested for everything else under the sun-and an abnormal pap can be caused by many things- and if she had a normal pap afterwards and no problems and she looks otherwise good- go for it. I highly doubt there is much risk to you at all- and I would MUCH rather have a cycler be open about her history than one who 'LIED' and I am sure they are out there- many are in it for the money and not altruistic reasons- so the next donor could have had multiple abnormal paps and not report it.
You can get an abnormal pap from, GROSS- left over semen, among other things- this doesn't mean she can't have an awesome cycle- if she had a family history of ovarian cancer they wouldn't let her cycle b/c of the health risks to her. I think you would be fine with her- and I think that your re would reassure you about this as well- the fact that she openly reports it probably means- it was a fluke, especially since it was normal this year.
I myself have had 2 abnormal paps in my life, and every other time they were normal- there is nothing wrong with me or my uterus or my cervix, i have no std, no cancer, and have successfully had a pg.
I would chalk it up to one of those things that happens and if you like her use her.
P.s. I am in the medical field so not just talking out of my *ss>
Jen