Michael Gartenberg:
The iPads method for dealing with document management leaves much to be desired. Attempting to manage files from the increasingly ill named iTunes is a mess. Worse, there’s just flat file storage for iWork which makes it frustrating if you have more than a few documents.
This quote is not representative of the article, as I think Gartenberg really likes traveling with the iPad. However this is one of the biggest holes for the iPad right now.