I've merged Tom's E-notif patch to CVS HEAD for MediaWiki 1.5, with some slight tweaks. Everybody please test to confirm that things aren't broken in the default states or with the new options enabled.
You'll need to run the updaters (maintenance/update.php or run the installer) to rearrange some bits in the database. user_newtalk has been merged into watchlist, and watchlist entries are now split up for separate entries for page & talk and have a last-viewed timestamp. User entries also now have an e-mail authentication flag/timestamp.
-- brion vibber (brion @ pobox.com)