Thanks to a slew of folks that helped test this, I am posting another version of the text file importer updated for OneNote 2013. The ZIP file is down below my name and it has a readme for how to install it.
Not much more to say here and http://blogs.msdn.com/b/johnguin/archive/2010/06/24/the-text-importer-powertoy-gets-updated-for-onenote-2010.aspx has a good introduction to the tool.
As always, let me know if you hit any snags.
Questions, comments, concerns and criticisms always welcome,John