Apple just released an upgrade to their backup utility, which is aptly named, Backup:

Backup 3.1 delivers added support for some backup destinations and addresses file restoration and other issues. Backup 3.1 is recommended for all users of Backup 3.0. Significant areas addressed are:

Improved support for iDisk, local hard drives, and some network destinations (Mac OS X Tiger only)
New iWeb QuickPick and updated iLife plan
Addresses issues with restoring files
For more information about Backup 3, visit the .Mac website at: http://www.mac.com

For Backup 3 support information, visit http://www.apple.com/support/dotmac/backup/

Requirements
Macintosh computer with a PowerPC G3, G4, G5 or Intel Core processor.
Mac OS X v10.3.9 or Mac OS X v10.4.2 or later.

Run Software Update to get the download.