If you haven't discovered Priscilla Dunstan yet... You may want to check her amazing discovery regarding baby language. I have found this invaluable with my new little one! www.facebook.com/howtoSpendLifeLiving
Dunstan Baby Language | Crying Baby We tried this in our playgroup - it was amazing that some of us could match these sounds to what our baby needed...failproof? Probably not - worth a look though just in case your baby uses these cues.