Plugin Site: http://www.wppostgen.com/
(Screens + Demo Video can be found on url above)
wpPostGen (Wordpress Post Generator) is a WordPress Plugin that allows you to upload a CSV dump file containing your post data and imports them into your WordPress blog as posts.
Ideal for Tube themes, YouTube-like sites or other syndicated content solutions that need to import feeds into WordPress from a downloaded CSV file.
You select the interval ( months, weeks, days, hours, minutes ), the amount of posts per interval and a start date, then select the column relationships, wpPostGen does the rest.