I just wanted to give a heads up to the product from http://www.csvreader.com/. I have worked with the creator of this product, and I have worked with the DataStreams product he sells quite a bit, and it is hands down the best C# ETL product I have ever worked with. It simplifies all of the "hard" stuff you have to work with when it comes to managing data in C#, from parsing of data files to creating correctly formatted outputs.
Since it implements the parsing as an IDataReader, it makes importing data into databases dead easy, and it allows for record by record manipulation as the data flies by as well.
