Since the WisCon ConCom released their statement on the issue, there have been several important posts written about the situation, and I hope you'll read through them:
Thoughts on Elizabeth Moon and the Wiscon ConCom's Response by Tithenai
Elizabeth Moon, Wiscon, and the Responsibility of Dissent by Nojojojo
ETA:
After reading the new essays I've listed below, I can't help but change my mind: Moon should be disinvited, outright, and I'm ashamed it took me this long, and reading this much hurt, for me to come to that conclusion. I'll be sending another email to the WisCon Concom, making the request that she be removed.
WisCon and what we mean when we talk about institutionalized power by Yeloson
Wiscon + Moon + Things Certain People Do by Seeking Avalon's Willow
Raising the Bar by K. Tempest Bradford (These other two posts of Tempest's are also really, really worth reading)
Over the weekend, I also spoke with a source I trust who told me that this is only one more example they've seen firsthand of lousy, bigoted behavior on Moon's behalf over the last several years. I'll still be attending, as I want to support Nisi in her time of celebration, because I loved the Tiptree-award-winning Filter House, because her book Writing the Other was a tremendous help to me in writing my own books, and for even more reasons that'll eventually become clear. But damn, WisCon. You'd really better shape up. There are an increasing number of attendees on the verge of letting you die on the vine for this kind of behavior. I've got a reason to go this year, but unless I see some evidence that'll change my mind, it may be my last.