Ok, so here goes... It will be set in the world of Eberron, we can start at level 6 and use any of the 4.0 core or Eberron books(though if your wanting something from FR, your free to ask) Also, we will be using the taint rule from Heroes of Horror and Skin Grafts and what not...
If there is anything you are wanting from the 3.5 books Heroes of Horror, Book of Vile Darkness or Libris Mortis(that hasn't been updated to 4e ala books like Open Grave) then we will suss a way to make it work.
This will be for 4 players, though my arm may be twisted into having a fifth =)