OP- I went when DD was around 7 mths and we had had about 3 mths of her waking 2 hourly and I just couldn't do it anymore. She was a feed to sleep bub and I din't mind doing it early on, or when she slept for 4-5 hours at a time but once it got that bad I just didn't know what else to do. I went to QEC in Noble Park and they have some info sheets on their website as well. I know some people who have been to O'Connell house in Canterbury who also got alot from it and there is also the MBU at Mitcham Private if you have health insurance.

Basically they teach to comfort without picking them up, so patting, leaving them at times (particularly as she was crying more with me there). I found it great - I didn't do it exactly as they said but it worked for us. I think the thing is you could put your name down (they can take months and months to get into) you can then see how you go, as it is better to cancel later on, than to get desperate and be told you have to wait 6 weeks.
With DS we went through a similar experience but for 4 mths and he was waking 1-2 hourly. I used methods from the sleep school with him and for both of my kids it only took one night before they clicked and are now wonderful, happy sleepers. Good luck.