Yes, you can take notes inOneNoteandsyncthem to your smartphone. By
design, theOneNoteMobilefolder is the only folder which syncs back and
forth.
If you have pages scattered all over the place and want to send them to the
device, you can use an addin I cowrote athttp://blogs.msdn.com/johnguin/archive/2007/06/11/making-pages-easier....
It gives you a button to copy the page you are viewing over to theOneNoteMobilefolder. Saves a little time manually copying the pages around.
John