I seriously doubt CNN or the White House use shared hosting. It's the cheapest option for most people and there are certain limits and security issues you wouldn't come across like using a vps or dedicated server. Why not just say why, specifically, you are wanting a second shared hosting account? Is there something in particular you are wanting to do? I know you said you want to keep sites separated but that's only aesthetic really unless there is some ulterior motive. Perhaps our responses would be a bit more helpful if you clued us in.
I know, it's ancient. I'm too lazy to delete the version of drupal that's on there (I think it's 4.x lol...). That's why you see those messages, code has depreciated. I don't use it anyway...just haven't changed my signature.