The governing agency for adoptions in Texas is:
Texas Department of Protective and Regulatory Services
PO Box 149030, E-557
Austin, TX 78717-9030
(512) 438-3412, (512) 438-4986, (512) 438-4516, Fax: (512) 438-3782
The attorney for a private adoption should release non-id but not all do. Most state adoption governing agencies in the U.S. say that an adoptee is "entitled" to non-identifying information but they do not seem to have the authority to enforce that rule.
Other great websites to check out:
Adoption.com Forums
Adoption.com - Information on International, Domestic, Child & Agency Adoptions, Stories, Laws -
Adopting - Adopt a Baby, Child, Infants, Kids, Older, Services, International, Information China -
Adoption Registry - Records, Reunion Registries, Adoptees, Search Reunite