I used an out of state attorney Demastus Law Office in Oklahoma ( www.dloadoption.com) . Oklahoma is one of the 9 most adoption friendly states in the country ( from adoption for dummies) as the birthparents can sign the paper work giving up parental rights 3 days after birth and it is irrevicable.
I used Adoption Resource Associates ( Dr Laura Nemeyer) she is an independent social worker who does your home study and then acts as your local Massachussetts agency. This frees you up to go any where in the country to aodpt. She is WONDERFUL !!!! and recommended demastus Law Office. She will works with you if you want to adopt internationally.
Please feel free to email me if I can help or if you want to speak on the phone.