Before you plan to do this, please check that it is still possible to have a one-day turnaround. As far as I know, the State Dept was putting in a new system for the photos and many consulates are NOT equipped with the machines. They have to send the paperwork to the US and have the passports done there.

According to the US Consulate in Paris:

Beginning on April 8, 2002, American citizens residing or traveling abroad who require issuance of a U.S. passport will be issued the latest, state-of-the-art passport incorporating a photo-digitized image and other enhanced security features. These passports will be issued at the National Passport Center (NPC) in Portsmouth, N.H. and returned to the Embassy/Consulate abroad by express mail. U.S. Embassies and Consulates will continue to issue passports for emergencies requiring immediate travel.

For passport renewals: U.S. Embassies and Consulates will forward the approved passport applications to the National Passport Center by express mail and the new passports will be returned in the same way. Processing time from application to
delivery for the new passports should be no more than 10 days.

While the added document security will benefit all Americans, especially those overseas residents who are frequent travelers, we recognize that this procedure will take more time than our previous same day service. As this new security initiative is introduced, let's work together to make the transition smooth and effective. We ask that you take the time to please check your passports to see when they expire and be sure that you apply for replacements well in advance. If at all possible, please renew your passport by mail instead of making a time-consuming personal visit, which is usually not required. You may refer to the Embassy website for further instructions on how to renew your passport by mail."