From Bill Virgin's column:
"KRKO-AM (1380) in Everett said it has cleared the final legal hurdles to begin construction that will allow it to boost its power to 50,000 watts, and to add a second channel on HD radio. KRKO said construction should be complete later this year."
Hmmm... AM HD does not allow for a "second channel". That would be FM. Did KRKO tip its hand to Bill V that it's working on an FM signal of some sort?