This document provides the release notes for Fedora 18. It describes major changes offered in the Spherical Cow as compared to Fedora 17. For a detailed listing of all changes, refer to the Fedora Technical Notes.

via Release Notes.

The Gnome2 fork MATE is supposedly integrated with this release.  After reading the comments on slashdot I’m not keen on upgrading and will stick to FC14 or if another MATE release becomes available that supports system monitor.  System monitor is so important for security and general maintenance of the system and yet most consumer devices don’t include it.  System monitor is equivalent to the temperature guage in your car.  You want to know if the engine is overheating just like you want to know if your computer is causing unexpected traffic on the network.