Found a great website last night - Concerned about your child's language development?

Babies develop language at different rates. Even so, before their first birthday most babies will:

Enjoy watching your face
Show delight when you reply to their chatter
Love you imitating them
Notice familiar sounds and voices
Enjoy books and music
Play with sounds
Understand their name, basic commands such as "no", and the names of familiar objects
Understand daily routines, such as bath and bed times
Try to join in with action songs
Attempt some real words
Sound as though they are speaking your language
Most babies will say their first words between 12 and 18 months. They will have a burst of language development before they turn two, and begin to join words together by two and a
half years.
HTH and that website is a really interesting read! I guess I just like it because it says DS is advanced LOL (eta - he has over 200 words on his second birthday and more and more and more every day!). But your baby is perfectly normal if not slightly advanced too.