Apple has announced three new features to their .mac web services suite:

.mac Groups: Apple’s following the lead of Google and Yahoo by starting their own “groups” for .mac members. Stay tuned for more information and the DT Fan Club!

Additional storage: iDisk and email storage space has been increased to a combined 1 gigabyte. Users may purchase an additional 1 GB of storage for an additional $50 per year.

Backup 3.0: Backup 3.0 includes a number of new features, including incremental backups, the ability to backup multiple Macs, and a number of new presets for iLife apps, among other new features.