We've recently partnered up with CoreProtect to test and help offer fast and efficient logging and rollbacks. For those who do know what it is - CoreProtect is a fast, efficient, data logging and anti-griefing tool. Rollback and restore any amount of damage. Designed with large servers in mind, CoreProtect will record and manage data without impacting your server performance.
IMPORTANT: For those who are running the OLD 1.4.X build, you need to update to the latest 1.5.X build because the old version can cause high CPU usage and lag your server out.
You can read more about the plugin here: http://www.coreprotect.net/