To update you on the process:
Gladney Application: Complete and Approved! (As of Dec. 14, 2007)
Home Study: Complete and Approved! (As of Dec. 10, 2007)
I-600A: Application Complete. Awaiting I-171H. (As of Dec. 11, 2007) Current wait times according to the USCIS for the Philly branch office< 3 months.
Ethiopian Dossier: Awaiting I-171H as final document to complete dossier. The documents originating in Pennsylvania still have to be authenticated (should happen next week.) So, things are moving along! Yippee!