It's been down for a day, and may be down for a few more. Looks like "Just build your own Internet" isn't a viable option for internet communists, everyone must learn of their peaceful ways by force.
Trying to get to Saidit redirects you to Saidit's Subreddit, in a sad state of affairs.
EDIT:It's come back up since then. Updates in the link.
More or less. I call TAM the trans teenage admin a nutcase tranny child all day and he hasn't deleted anything of mine that I am aware of.
But he is demented and anything that can by the wildest stretch of the imagination be twisted into seeming akin to a threat or a call for violence triggers him.
As far as I am concerned, his arrival on Saidit has rung the death knell for the site.