I've got several Ubuntu 10.10 servers which should all be set to do automatic security updates.

Is there any way I could get them to send me an email when they apply updates (particularly if they fail)?

I'm using r-u-on to monitor availability, disk space etc but the security updates are very important and I don't have a good way to monitor them.

I could possibly script something myself but I figured it's the kind of thing that's probably been solved many times already.