At 2, my son spoke only 16 words. He now goes to speech therapy through the local Community Health Centre (for free) as well as to a Developmental Paediatrician.
These are the suggestions I have been given to help him along:
* speak in 2 word sentences repetitavely, focusing on one word at at time eg. blue CAR, CAR go, CAR stop, CAR brum.
* get him looking in your eyes when you talk to him.
* get him into daycare at least 1/2 day a week so that he has to communicate.
* make sure he doesnt walk around with a dummy in his mouth, only use them during naps.
* hold objects next to your mouth when you tell him what they are called.
* use simple words eg plane, not aeroplane.
* speak clearly.
* when you play with him, narrate EVERYTHING, but use simple terms.
It gets labour intensive, but I can honestly tell you that these things make all the difference. My son now tries to say nearly everything (3 months later). We even went to Brazil and he now speaks a little Portugese. Having said all that, I think he was ready to start talking. You can lead a horse to water, but you cant make it drink. All you can do is make it easier.
Also, check the Australian Speech Therapy website - they have lots of useful info.
Heraani, Mum to Lucas (27 mths)