ELFswe: Apparently, if Muricans call this number "1-858-WHEN-KRZ" this message should be heard...
"The current status of Kentucky Route Zero is preparing for publication. More detailed information will be available shortly. You may wait with us if you want to. Please hold."
Apparantly, after holding for a while, an estimated wait time is given too. The guys over on the reddit have calculated that it should be coming out today.
I'm pretty excited about this -- I've held off on playing the game until all five episodes are released.