Apple updated both the Time Capsule and the Airport base station today. From Apple:
You can now access all the files on your Time Capsule drive over the Internet. Simply register your Time Capsule with your MobileMe account, and its drive appears in the Finder sidebar of your Mac just like any other attached drive. It’s like having your own personal file server wherever you go.
Mac Rumors has more:
…now offering simultaneous 2.4 GHz and 5 GHz dual-band networking “for optimal performance, range and compatibility.” The new models also offer the ability to set up a secondary Internet-only Wi-Fi network to allow family and friends to access the Internet without giving them the password to the primary network or allowing them access to networked drives and other peripherals.
The MobileMe integration on the Time Capsule is pretty neat on paper, but if it works the same way “Back to my Mac” does, users will still have problems with the service. That said, faster wireless networking is always welcome.