wishlist -- Automatically clean up old kernels

I would like to add a wish list item. I think there should be a program that can detect a new kernel installation, then monitor the system to check for stability, and after a certain number of reboots and successful logins (or days) it could offer to remove old kernels. I first discussed this idea in this post http://ubuntuforums.org/showthread.php?t=554849 on the Ubuntu Forums and more detailed information can be found there.
The idea is to clean up the GRUB menu list to make it less confusing on users (mainly switching from Windows... generally dual-boot systems). There are a lot of posts referring to the long list of kernels and in almost every one of them someone asks "What is a kernel?"

Please see the post on the forum for more information.