Well, I'm not convinced this is totally planned maintenance..
My guess, since it's still down, is that the maintenance was supposed to be really quick and something went wrong..
Hopefully there are backups.. ;-)
I can't tell you how many "quick changes" end up taking much longer.
And people don't generally want to redirect to a "down" page because they are working on it and it will be up shortly!!!
(I've seen that shortly take a long time... )
desiv