Here is an entry from the Ancestry.com Monthly Update:
Naturalization records are key to helping you discover your immigrant ancestors and ethnic origins. In January we released indexes to 3 million naturalization records around the country. In February, we released 2 million original naturalization records from Pennsylvania, California, and New York. And this month, we’re adding about 350,000 records from 15 new states: Colorado, Montana, Oregon, Washington, Maryland, Virginia, South Carolina, Louisiana, Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, and Tennessee.
If you don't have a personal subscription to Ancesty.com, you might want to check this database out at the library, especially if you are researching the state listed above.