My son is 16 months old now. He is trying so hard to talk. He does a pretty good job of following directions (when he wants too) and understands us pretty well. But the words he can say are:
Up (complete with arm gestures)
Nyo (which means yes - usually with a head nod)
Ball (he says this when he is throwing a ball)
Apple (this word is very clear with 2 syllables)
All Done (complete with hand gesture)
Blue (Blue's Clues)
We are still waiting for him to put two words together, but he is doing a pretty good job. We are proud.