As FamilySearch digitizes records, webmasters often add the images before the indexes are completed. You won’t be able to search such collections for a name until the index is added, but you still can browse the record images.
To browse, click the region of interest in the map on the pilot site home page. You’ll see a listing of collections by country; click the collection title you want. Next, choose from the subcategories (which might be counties, dates, or alphabetical ranges—it depends how the records are organized).
Afew of the collections containing images but no indexes (yet) are civil registrations from Jamaica’s Trelawney Parish, the 1892 New York state census and Catholic Church records from Avila, Spain.