That's crazy that these plugs are so bad, you would think that in a difficult time like this for manufacturers they would want to do right by their customers and at least foot the bill for their faulty design.
I am waiting for one of the Hemi owners on this site to chime in about changing plugs though. I don't know much about the new technology so it might have hit all the manufacturers now (hell it might even be on my truck, with 8,000 miles I gas & go don't dig in the engine yet) but the Hemi's have 2 plugs per cylinder with the COP crap, when I looked for my 08 plugs and wires for parts only was roughly 600.
As far as I've heard, no major issues, other than twice as many plugs

What's that COP?