Josiah is properly signing "more", "milk", "hungry", and "all done". I started signing with him about ten days ago, and suddenly it all clicked! He's using the signs appropriately and specifically to get what he wants (not just in response to us.) Hurray for communication!
He is also pointing very effectively and continuing to say "over there" and I think he's also adding "that". If he thinks something is exciting and wonderful he greets it with an adorable "oooooh!!!!" So far, the most exciting and beautiful things he has encountered are trees. That boy LOVES TREES. He wants to touch them, and look up into their leaves (especially if there is a breeze blowing!) and especially likes it when I lift him up to sit on a branch. Maybe he'll grow up to be a naturalist. :)