It's all about the interview with Zwan...
http://www.pumpkinssmashing.com/stories/headline_5.htm
TPS: On that subject, David, why did you hide behind the name Skullfisher?
Pajo: I did what now?
TPS: Oh, you know, refuse to give out your real name, and only call yourself Skullfisher, giving the band a mysterious air-
Pajo: WHAT?!?
Corgan: Oh yeah, I… forgot to tell you… remember we, ah, sort of talked about that, Dave...