Well, what was seemingly the final signoff has taken place minutes ago. Right after the paid advertisements, David Sanborn's "Chicago Song" was cued up for what was the last time. Then the TOH (Top Of the Hour) station ID took place. It still ID'd as WLFM-LP. Now, they're simulcasting FM News 101.1 WIQI. I don't know what this will mean for the next TOH ID. The stream is still running. They could start IDing as WKQX-LP at the next TOH ID. I'll be listening online until then as long as the stream is still running.
Right now the calls are still WLFM-LP. However, last Tuesday WLFM, LLC did file a request for the WKQX-LP calls. It doesn't specify what station they plan to use them on but one sure can't imagine them using them anywhere else!
I might guess it'll stay WLFM until they have the permanent format ready to go. But that's only a wild guess.