I've just added the "new_only" parameter to ->list_recent_changes, to let you ask for e.g. all pages added in the last week (as opposed to all pages edited in the past week). This involved a bit of a rewrite of ->list_recent_changes, and I'm not convinced that the test suite covered everything that it should have, so I may have introduced bugs.
This change is in svn. I'd really appreciate it if people could check the svn versions out and run the tests, particularly if you have multiple backends to test on (SQLite, PostgreSQL, MySQL, Plucene, Search::InvertedIndex, etc).
svn co https://urchin.earth.li/svn/wiki-toolkit/wiki-toolkit/trunk
Kake