I wouldn't encourage toiletting in the crate, as I too feel it can aid housetraining and most dogs only go in their crate if they are desperate, having said that certain breeds (don't know which breeds though, sorry!

) apparently will soil their own crate with no problems.
I didn't use paper when housetraining mypup as, I think Clare points out, it can lead to pup thinking it's OK to go in the house, although not always!!!
I know what you mean about the subtlety of asking to go out and missing it, my previous Terv would come and sit in fornt of me like Cleopatra, very erect (good posture LOL!!) and ears up, staring at me, willing me to take notice. My pup Banya wanders up and down the room but sometimes does this anyway, there is a difference in the way she walks (no jokes about crossed legs please <g>) but just barely.