Although MTV pink-slipped a bunch of TRL staffers Wednesday and ratings for the seizure-inducing countdown show are down (way down), it isn't being canceled, sources insist to Variety. But, according to the New York Post, it will soon have a new host: The paper says the network can't wait to dump Vanessa Minnillo when her contract expires in April; Susie Castillo is considered the frontrunner to replace the future Mrs. Nick Lachey. (Does the fact that I couldn't identify Susie Castillo if I saw her mean that I am officially a geezer? Or is it that I believe that ratings would improve if maybe MTV ran the occasional video without the banal e-mail shout-outs and constant corner-of-the-screen commentary?)