1408: 6 out of 10.
I'll start this little review by telling you that I've seen many ghost stories that were much, much worse than this one. In fact, 1408 isn't that bad, and it's kind of creepy, it's just not scary enough.
That's the problem with movies like this. They're one trick ponies with a single purpose. They're supposed to be really scary, and that's not easy. The scariest part of 1408 was probably the use of the Carpenters' hit "We've Only Just Begun".
Now that's scary.