It seems to me that there is some confusion with people trying to define Discordianism as a belief system when, in my mind, it serves more accurately as a name for a certain type of thought pattern. The common factor among all Discordians, regardless of whether you eat up dada bullshit or practice chaos magic or what have you, is that we all believe what we choose to believe because we choose to believe it, not because it's "good" or "right" to society or to anybody else. Ergo, two Discordians may have entirely different belief systems, but both will have chosen those systems on their own, by their own reasoning, and are likely to give them up in favor of new ones the moment maintaining the old ones becomes impractical.
Discordianism, I think, is not like other religions - you do not convert to Discordianism, but you are born a Discordian. Those crazy bastards who wrote the Principia Discordia weren't creating anything, they merely gave it a name.