I went over to Wikisource to check on my watchlist. I signed in, went to said watchlist and discovered all the links were red, i.e. nonexistent. What the heck is going on over there?
No idea. I didn’t have a WikiSource account, so I can’t tell. WikiPedia and WikiBooks are working just fine. 
Yep. it appeards to be empty.
Seems to be back now.
I still got nothing. How odd. Wonder what Jimbo is up to?