I have, it's more a diatribe on gender inequality than anything about Letterman, that's just the appetizer like Texas Roadhouse rolls w/ cinnamon butter to get you in the door to read the rest of it (though those steaks are damn good too).
I just listened to an interview with her on NPR's Fresh Air.
Although she does make the point about being uncomfortable there and also that she felt that others were favored for sexual favors, she went on to make other significant points.
At least Letterman gave the opportunity for female writers. She said she was never pressured to have a sexual relationship or any overt harrassment.
She went on to give examples of Jon Stewart accepting his writing emmy and talking about diversity in writing staff while being surrounded by 20 white male writers.
The new Leno show is exclusively written by a staff of white males. She stated that the loss of the 10PM drama in that timeslot threw a fair number of female and minority writers out of work.
She gave several other examples of talk shows with exclusively white male writing staffs. Conan was one I recall.
This does make it more difficult to make your case that Dave's cavorting made it tougher for a female to succeed in the field.