From the Publisher:

Carbon Copy Cloner

The key to a successful backup plan is to actually do the backups regularly. When left to a human, the task often gets tacked on to the end of a very long list of other things to do. When you eventually have a catastrophe, the data is simply gone. You know that feeling -- you just lost six years of family photos. Your kids being born, their first birthdays, their first everything. The answer to this is consistent and regular backups, placed on a schedule and handled automatically by your computer.

Among the new features are:

• Support for block-level disk-to-disk clones.
• Synchronization built-in, not bolted on.
• Support for backing up across the network to another Macintosh.
• Advanced scheduling capabilities -- Backup tasks can now be scheduled on an hourly, daily, weekly, or monthly basis, or you can indicate that a backup task should run when the backup device is attached (e.g. an iPod).
• CCC recognizes iPods specifically, allowing time for the iPod:iTunes synchronization to complete.
• The ability to drill down into folders to select exactly what gets copied and what doesn't (you can drill down indefinitely).
• Built-in software update feature notifies you when updates are available.