In the footer of my page, I would like to add something like \"last updated the xx/xx/200x\" with this date being the last time a certain mySQL table has been updated.
Not sure if this would be of any interest. Using mysqlproxy in between mysql and clients, and making use of a lua script to update a key value in memcached according to interesting table changes UPDATE,DELETE,INSERT was the solution which I did quite recently. If the wrapper supported hooks or triggers in php, this could have been eaiser. None of the wrappers as of now does this.