Saw it on the shelf at a local bookstore, started reading, and took it home. The individual pieces range from good, to stunning ("Packing a Rod" by Allen James and "The Gender Cops Work Overtime" by Gina Reiss are immediate standouts, both good enough to demand being read aloud). The authors address behavior, family relations, social relations, sex-reassignment surgery (whether or not to have it), the bi-gender system, and other topics.
"Genderqueer" is a "pull it off the shelf for guests" book - I don't know any other way of putting it. As a transgendered person, I have a number of books on the topic, including Riki Wilchins' excellent "Read My Lips." However this is the one that I find myself repeatedly grabbing for non-transgendered friends and family to highlight ideas and create awareness of the range of gender expression and identity issues. It is also a book that I have to work hard to keep it coming back to me - it has a tendency to go home with guests.
Be forewarned, though - this is not a book for the easily offended, be you straight, gay, queer, trans- or not. If you need your own feelings and ideas confirmed and validated, better to read something else. A number of the authors are brutal in their honesty, coarse in their language, and express disturbing opinions. For me, though, "Genderqueer" was enlightening, stimulating, often hilarious, and occasionally infuriating.