Okay, Keith is out of jail. He has been released from the Prescott jail on bond, pending his March 5 court date. A summary of events can be found here.
Disturbingly, it appears that he was mistreated by police and his jailers. He was told during the arrest that he had no right to an attorney and was put into solitary confinement in a poorly heated cell without adequate bedding. According to his laywer, Michael Kielsky, something "very political" is going on. "They gave him an extra blanket but then an hour later they took it away," he said, "this is a 66-year-old man with a heart problem."
Thankfully this case is getting a fair amount of attention, including the C|Net news article (cited above) getting cross-posted to the New York Times.
Also, R. U. Sirius has posted an interview he did with Henson back in 2003. Which reminds me, we also did an interview with Henson back in 2003 for Betterhumans.