"....Gannon, whose real name, according to investigators at DailyKos and other blogs, is James "J.D." Guckert...."
I just checked my Penn State alumni directory and found this entry:
Guckert, Donald James '78 BS, '78 BA, '86 M ENG
r: (address in Columbia Missouri and phone number follows)
I don't know if this is the guy, but it looks pretty coincidental. There are two other "Guckerts" listed, but one is a doctor who graduated in '61 and the other graduated in 2000. Neither has a "James" in his name.
Nice bit of research. Let's see how that ties into what shakes out over the next few days.