The path to Mamahood: Adoption and Surrogacy

An urbanMama who is looking to expand her family asks a really great question.  Perhaps some of our readers can share some resources:

We are beginning to consider adoption/surrogacy to expand our family.  I am emerging from 2 years battling cancer and it's side effects, the most emotionally devastating of which has been going into premature menopause.  We had a crazy rush before chemo/radiation began to freeze one embryo, so our first option would be surrogacy, a (very, very) long shot with only one embryo.  Does anyone know of any good resources to start exploring the surrogacy option?  We are also considering adoption.  Does anyone have experience with adoption agencies or other resources in the Portland area?