Hey Apple, it'd actually be a cool and keen idea to have one of these...but how about you make them solid and not flake out every few months.
MY AEBSn (pre-dualband) flaked out on wifi, dual-band AEBSn same story, now my 500GB dual-band timecapsule is doing that.
i have my backups stored and a moderate itunes library on there running almost 24/7 since March now it wants to crap out (the wifi not the drive)
Ive read too many people with problems if youre actually using it alittle bitmore than what they advertise it for. even then it doesnt perform as good as it should, im on my replacement TC so hopefully this will actually last awhile longer.

You can connect it via ethernet or wifi to distribute either or.
But why even do that when the TimeCapsule has dual band and guest networking which you can set the speeds for.
the updates are relatively the same id say USB back up..moderately slow but the first one is the usual pain in the arse...just because it indexes similar to spotlight where it has to account for every little bit and byte.
after that ive had relative quick backups 2GB ~ 15GB under 30minutes when i was using wireless