Can anyone say "NETGEAR ReadyNAS"?
Because when you look at it, the NETGEAR ReadyNAS (used to be Infrant ReadyNAS before NETGEAR bought Infrant) costs about the same amount as the Drobo with the DroboShare thing, but has way more features, better warranty, and works with everything.
And no, I don't work for NETGEAR, but yes I do have one of these ReadyNASs and it's been a god-send.