Red Hat Network. It is a revenue strategy for RedHat that simplifies the end-users' task of keeping his/her system Up2date. When you register, you create a profile of your box. You are then notified as updates relevant to your system's profile become available. For the sysadmin, they don't have to keep an eye out for security patches (maybe this is bad, but it is convenient) and RedHat gets a nominal fee for the effort. I have a few machines subscribed.
scott
