As it turns out, respected LGBT specialty publisher
Lethe Press is also participating in Smashwords' RAEBW sale, with 25-75% off selected works, including 75% the American Library Association's Over the Rainbow list pick
Heiresses of Russ 2011: The Year’s Best Lesbian Speculative Fiction which I included as a bargain over at Weightless eBooks' FTR sale several days ago when it was 50% off, and will shortly be picking up myself since I held off getting it there.
(ETA: They also offer ree with coupon story collections by Catherine Lundoff & Simon Sheppard. And several anthologies, actually.)
ETA:
Joe Jackson, who has written articles for Rolling Stone magazine and other music industry publications, offers 50-75% off selected celebrity biographies, which he says contain previously published material.