We are starting a big project to merge our public web site and our transactionnal web site. The IT guys decide we should use ADF Faces for the new hybrid web site. Nothing wrong so far.
This blog entry should be helpful. It says: "Web crawler support, also known as search engine optimization (SEO), has been added to ADF Faces in Oracle JDeveloper 188.8.131.52 (PS4) and Oracle JDeveloper 11g R2 (11.1.2)."
Couple this with Pretty Faces and you will have an SEO-friendly ADF website.