Shouldn't be using dreamhost. It's inherently insecure. For a project such as this (with the funding they now have) a dedicated or collocated server would be a muc better option. Dreamhost cost $10/year.
I
did not say that they use Dreamhost as Webserver - I don't know what they use.
I only said that they use
nameservers operated by Dreamhost.
Of course, when
all your nameservers are down, your whole service will be down (besides for people having the IP in
their cache or type it manually).
But of course, you
should never operate (let operate) all your nameservers by the same company or via the same infrastructure.
Ralf