One of the things that pushed me to upgrade to Fedora Core 4 was suspense of the automatic updates from the Red Hat Network a while ago. It seemed as though every time I wanted to install something I needed to search out the correct RPMs and install them before I could intstall the software I originally wanted to install.
FC4 opened my eyes to a totally new updating method; yum. I did a quick search and found The Unoffical Fedora FAQ which walked me through setting up yum and installing software for it. I installed the updated gcc compiler using yum and it only took a couple minutes to download gcc and any dependencies. "Wow, this is easy", I thought to myself, so I used yum to update OpenOffice.org to 2.0. This is definitely a nice tool to keep some of your general software up to date.
I don't think I'll use yum to keep my main database software updated. For example, I'm going to be doing research on having multiple versions of MySQL on the same system. During this research, I'm going to put MySQL 4.1 in one directory and 5.0 in another. I don't want my 4.1 software automatically updated until I want it updated.
I wonder if Oracle has a yum repository for Oracle Applications? (If you deal with Oracle Apps, you know what I'm talking about).
I think this will be a big time-saver.