My mother-in-law Sylvia showed me a website that has been very helpful in getting John to make more letter sounds. It is called www.starfall.com. We click on the ABCs and then John points to which letter he wants to watch. He will repeat some of the sounds like the "S", "P", "O", "F" etc.
This morning when John came running into my room I thought I heard him saying "T, T, T ooon." We usually wake up in the mornings by watching a little bit of cartoons and I always ask him if he wants me to turn on "toons" for him, so I think this morning he was trying to say it to me as I lay there half asleep in bed. He also now says "Ph, Ph" for please.