WTF why is it stuck?
yPool is having some issues with their wallet client. They're currently down for maintenance for "20-60 minutes" (what jh00 said).
My guess is sometime during the DDoS attack on yPool this morning, their wallet lost connectivity to the outside world.
Without them broadcasting the blocks they're finding, the network is "stuck" until they fix their connectivity issues.
Yes and no.
Yes, the next difficulty will be lower than if there had been no "network outage".
No, the difficulty is not currently changing. It'll change every 2048 blocks and there's still a good number left to go.
