Arnett was on the Today show this morning. He appeared right after Matt Lauer made the announcement that NBC, MSNBC, and National Geographic were "severing ties" with Arnett.
He apologized, sort of, but I don't think he indicated that he was leaving Iraq immediately. He seemed to hedge the question IMHO.
Imus' sidekick just joked, "Arnett has been hired by ABC." And a great joke it is!