Lists and ownership

I have a list of things (an address book), and I'm writing a simple Seaside 
app to display the list and CRUD entries. I have a bunch of basic, related 
design questions. Any help will be greatly appreciated. There are a lot of 
questions here; answers like "go read XXX" would be just as helpful as direct 
answers. I have read the few Seaside tutorials and docs I've been able to find.
Who should "own" the list of entries? Should I create the list as a class 
instance variable of the entry class, or as a global entry in Smalltalk?
How should my WAComponents access the list: by holding a copy (won't 
modifications to the list will be lost?) or by asking for the class instance 
variable/Smalltalk entry every time they want to access the list?
What should I register for backtracking: the list itself? Each of the list 
entries?
I'm looking at WATableReport, but I'm a bit confused about how to hand it my 
list of entries. Do I need to create WAReportColumn objects for each instance 
variable of each entry?
Are these even the right questions? :-)

Thank you for your help.

Jim
--
Jim Menard, jimm@xxxxxx, http://www.io.com/~jimm