If you're doing much video eventually you'll want physically attached storage. Even over 802.11n the copy times become maddeningly annoying.
USB 3.0 or FireWire attached storage ... Or something that speaks Gigabit Ethernet if your machines also have that... will make you happier, long-term... doing video.
Waiting hours to shuffle large video files around will eventually drive you insane. If you're doing any re-rendering to different formats you also either have to shuffle the originals onto a machine over the network, render new version, shuffle them back... or with reasonably fast attached storage you can just render on the fly to/from that disk.. (or better, read from that disk, render to the local drive, then copy if it's "done right".)
That said, I've used both the Apple Time Capsule and Buffalo stuff on the LAN for big file storage.
Time Capsule's throughput is significantly slower than almost everything out there but the integration/automation with Time Machine -- for desktop Macs -- can't be beat for "brain dead easy". It's completely useless for iOS devices, though.
Apple's model for iOS going forward is either wirelessly backing those up to iTunes or backing them up to "the cloud" which they're charging too much for. They've never done a direct iOS to Time Capsule feature. (Even though it would make sense.)
I have a few friends who are gaga over the Drobo stuff. I'm not willing to pay their prices. Cool boxes, but proprietary RAID schemes you can't recover if they barf, aren't my cup o' tea.
I think primary storage for most media producers is local add-on disks, rotated and backed up. The backups could be on a NAS device or just a copy of the entire drive to a "twin".
Just thoughts... Hope it helps Santa out.
