If I were at my office and I made similar statements and someone was offended (which they would be) I could definitely be canned. The same way if I go into work tomorrow and grab my bosses, hot as hell, secretary's ass I'll get fired too (SORRY SORRY I meant personal assistant).
However, Imus is a radio personality, his job is to give his opinions. Not help to grease the corporate machine, or be an opiate to the masses. Just keep a humble demographic for the show he sells. If people don't agree, then don't listen. He was a mild shock jock, and has said stupid shit in his past that was along the same lines. I think its hilarious that people are demanding apologies for this mans opinion. Thats one thing I never want to lose, the right to think and believe what I choose to, when I choose to. Even if it means defending an asshole like Imus.