If you want to know more about Apple's new Time Capsule or about how using Time Capsule compares to making backups with the newly available option of using Time Machine with a drive attached to an AirPort Extreme Base Station, tune into a recent pair of MacVoices podcasts, which bring together the networking perspective offered by Glenn Fleishman and the backups expertise brought by Joe Kissell.
In MacVoices #873 [1] they talk about the pros and cons of Time Capsule, plus how it works under the hood. In MacVoices #874 [2] the pair continues the conversation, looking at who Time Capsule is well-suited to, how backing up to Time Capsule compares to backing up to a drive attached to a regular AirPort Extreme Base Station, unexpected differences between the two Time Capsule models, and recommendations for which of Apple's hardware-based backup solutions to use.
[1]: http://www.macvoices.com/wordpress/macvoices-873-talking-time-capsule-and-more-with-glenn-fleishman-and-joe-kissell-part-1/
[2]: http://www.macvoices.com/wordpress/macvoices-874-talking-time-capsule-time-machine-and-more-with-glenn-fleishman-and-joe-kissell-part-2/