This is a site I saw recommended by a professional organizer.
You send this company your photos via UPS, they scan them for you at about 19 cents a piece, you check online the scans-don't pay for the ones you don't want, then they send you back your photos and disk via UPS. Looked good to me. Maybe there are better outfits out there somebody knows of?
http://www.scancafe.com/works.php#q6