>We want to bulk add a large number of people to a list.

Once they are ADDed, they ARE subscribed.

 >We want each of these people to confirm their subscription, otherwise be
 >deleted
 >from the list.

Send them the URL (either a mailto: or an http:) with the appropriate
operands e.g.,

mailto:[log in to unmask]

http://peach.ease.lsoft.com/scripts/wa.exe?SUBED1=lstown-l