Almost same issue for us. Status is still "unavailable" after 3 weeks. I spoke to someone at the National Passport Office, but she was no help. I also spoke with someone at the passport agency we used. He said "If they have cashed the check, they have the application. He said they are flooded with passport applications right now." I am also planning to contact US Senator soon. As of right now, wife has no US passport, and her original Naturalization Certificate was in the passport pack, too.
Passport website says expedited is now 5-7 weeks.