That cannot be easily done in the current version. you would have to
convert to text in either application, then copy/paste into the other
application.
If you want to edit the files, then it is a problem, but there are power toys
to print to one note, send to onenotel , and journal to onenote. there are
work arounds other than copying and pasting, depending on what you want to
do.
I use TheJournal and I have OneNote 2007. I prefer TheJournal. It uses less
resources, is very reliable, has great support, cheap, has calendar that is a
big plus, can import web pages, pictures, better overall.