I sent an email to the local apple store (I'm a registered business there) because I'm looking at getting a Time Capsule to back up my MBP and asked the following question, " Is it possible to add a USB hub so that I could plug in both a printer and external HD at the same time? For the time being, the external HD would just be used as Network Storage. Also, any HD that I hang off the network, is that available using "Back to My Mac?" The response, "With the new features in Snow Leopard which will be available tomorrow you could access the HD with "Back to My Mac" and yes you can add a usb hub and connect multiple devices to the Time Capsule."
Very cool!
Very cool!