I have tried to gather people's comments and my understanding of your needs
and here is a proposal that I think stands on its own (that is, I would
like to NOT refer to previous discussions).

1.	The list owner will be:
		sues@umich.edu (Sue Schuon)
	I (or Sue) could add other silent list owners
	(same privileges, less mail from LISTSERV)

2.	There will be a general information alias:
	chi-dis-information
		ACM SIGCHI Designing Interactive Systems Conference Information
	DIS-interest@xerox.com will point to it

3.	I do not think you want to create lists with names
	that do not reflect who gets the mail.
	It appears that you want this hierarchy:
		chi-DIS-All-Comm ... All Committee Members
			chi-DIS-Org-Comm  Conference Organizing Committee
			chi-DIS-Prog-Comm Program Committee
	From the www.acm.org/sigchi/dis97/ page, it seems clear
	that the Organizing Committee and the Program Committee
	are not the same, although everyone on the Org Comm
	might be on the Prog Comm.  LISTSERV allows a hierarchy
	of lists so that the definition of chi-Dis-All-Comm
	would be:
		Sub-Lists= chi-DIS-Org-Comm,chi-DIS-Prog-Comm
	and LISTSERV would send mail to -All-Comm to both lists,
	(pruning out duplicates, you'll be happy to know).
	Sending mail to org-comm and prog-comm WOULD cause duplicates.
	This setup will allow more future flexibility than a list like:
		chi-dis-OrgProg-Comm
	because you can add new sublists to All-Comm later.
	Forwarding Pointers:
		DIS-core@xerox.com -> chi-DIS-Org-Comm
		DIS-prog@xerox.com -> chi-DIS-Prog-Comm

4.	If DIS will always be a CHI (and only a CHI)  conference,
	then using a CHI- prefix might be a good idea.
	Otherwise, you might consider NOT using a chi-prefix.
	The main difference is that the DIS lists would
	not appear near the CHI lists when someone browses
	the lists at ACM.  My feeling is that you might
	regret the CHI- prefix later, and that you would not
	care about being listed with the other CHI lists,
	so your lists would be:
		DIS-Information
		DIS-Org-Comm
		DIS-Prog-Comm
		DIS-All-Comm
	(The hardest thing to change is a list name,
	so you want to get this right the first time.)