Why not set up a system where each article proposed for creation exists as a separate page. And there could be a special page set up which points to each of them. This special page could list the date and time created, the name of the proposed page, the number of bytes of the page, and the username or IP address of the proposer.
Surely that would be equivalent to just letting unregistered users create pages again and having a Special page that simply lists all articles that have only ever been edited by IPs.