PDO and PostgreSQL's LISTEN/NOTIFY

Is anyone aware of any effort currently underway to add support for PostgreSQL's LISTEN/NOTIFY (async notification) feature to PDO? At present the notification mechanism: http://www.postgresql.org/docs/8.1/interactive/libpq-notify.html is only available within PHP whilst using the old-style API: http://www.php.net/manual/en/function.pg-get-notify.php Unfortunately this means that applications ordinarily using PDO have to include a mixture of old/new APIs (and separate connections/sessions) if they want to receive notification messages. I was thinking of putting some time into proposing an addition to the PDO_PGSQL driver: http://www.php.net/manual/en/ref.pdo-pgsql.php but didn't want to duplicate effort if someone has already written the code to handle this feature. Thanks..