I have heard that newer MRI technology will not be affected by metal. 
Currently MRI can potentially move or heat up metal objects in the
body such as clamps inserted in surgey and joint replacements.  I was
wondering how this new technology will work (since I assume it will
still be based on magnetic fields)?  If you could both answer the
question and provide links to articles or citations where I could read
first hand reports, this would be extremely helpful.

The heating part is easy: because the metal is attracted to the
magnet, they rapidly oscilate the magnetic field. Since heat is a
measure of the average kinetic energy in a substance, incucing movment
leads directly to heating.

http://ej.iop.org/links/q43/mT7eWgJC8WYjdw,S,2mcdw/nano4_8_029.pdf

I highly doubt you will be able to find any such articles.....I'm
quite familiar with MRIs, and regardless of small advances in the
technology, they are all based on magnets and anything inside the
specially constructed magnetically shilded room they are in (which
necessarily includes the patient) cannot contain any metal; the
magnetic forces will wreck havok with them....