hi i experienced the same situation as Ryan. I didnt change host or change domain.. simply made mistakes in erasing some files. So I tried to reinstall WP and upload the old DB.
I browsed the table and comments and they are all not empty. In term of size the .sql file is about 5 MB so I assume it should not be an empty DB.
However, I still have not had the previous posts appear again. All I got is a default new WP sites ??
can you advise me on this?