Update: 5:56pm: MSNBC is ceasing its simulcast of Imus in the Morning, a trusted tipster tells TVNewser. The announcement will be made Wednesday evening or Thursday morning...

5:49pm: Senior NBC execs are in a meeting about the Imus situation this evening, TVNewser hears...

"Imus is a goner," a forward-thinking e-mailer says. "Now I think we need to figure out what MSNBC's new show will be. I like a Contessa Brewer/Amy Robach show..."