I have also used the NCSS ideas. My baby is a lot younger than yours, but we have had huge success with it. We ony co-sleep sometimes, as we find it doesn't really work that well for our baby. (even though I love it!)

One thing I have to say about the NCSS though is that it's not a quick fix. We have got our little girl to the point where if she does wake for a reason other than hunger, we can verbally reassure her, and re-settle just by shushing. But that took us 11 weeks, and it was 2 or 3 weeks just to get our night wakings down from 10 to 2 or 3 (it's now 1) But I highly recommend it. Just persist.

Our baby is too little for Jay Gordon, but I believe that his methods would work.

Good luck!!