http://www.everyonesleeps.com/
She speaks to our parents of twins group regularly and I found her talk extremely informative and helpful. She does lots of one on one work with families, on the phone and in person. She's kind, non-judgmental, and flexible in approach. (For instance, she will tell you that all approaches work - sleep training, CIO, cosleeping, etc... - that it's just a function of figuring out what works for you and your family.
Good luck!
I know there are other speciailists in the area who do this also - you might search on the parenting forum and the nanny forums to see if that pulls up another name or two for you.