CNET have published a review of the Apple Time Capsule (500GB) which facilitates the automatic wireless backup for your Mac. 'When Time Capsule does ship, it appears that it will be the only device out there that combines an 802.11n wireless access point and basic network attached storage. Apple's old Airport Extreme access point comes close, in that it has 802.11n and can accept an external hard drive via a USB port. Time Capsule looks like a more complete, self-contained solution.
We love the idea of seamless data backup, and in Time Capsule we think Apple is on the right track. As much as we like HP's MediaSmart Server, its name is intimidating, and the features it provides are a bit complex for the average home customer. But with an apparently user-friendly product that's akin in appearance and function to the Wi-Fi access point you might purchase anyway, Apple appears to be almost sneaking backup capability into your home. While Time Capsule will require some software setup, the hardware installation looks to require only that you plug it into your network as you would any wireless router.'
Read: Apple Time Capsule (500GB) - CNET