I wouldn't call Don Imus a conservative. Just like Rush, he's made disparaging remarks and used derogatory words about men every day of his decades-long career, but it was a comment about a group of women, not even a specific woman, that made him apologize for the first time in his career after losing sponsors and having the governor of New Jersey almost get killed crashing at 90 mph on the way to a meeting about the incident just so the governor could earn some angel wings with the female voters, just like Obama had to call that slut and give her sympathy so he could get some election-year angel wings.
Other similarities: They are both old white men who made comments (jokingly in Imus' case) about "innocent" little college women, in one case a basketball team who looked like sluts, and in the other case an activist who acts like a slut. Notice the headlines always label Sandra Fluke as a college student rather than a political activist to give her an air of innocence and to try to portray her as a private citizen rather than a public figure so she can try to sue Rush for slander. Also the Rutgers sluts totally cleaned up their ghetto look for ther public appearances. What, were they afraid that Imus had a legitimate point (especially when he compared the Rutgers team to the Tennessee team, who he thought looked nicer.)