check these out. Not sure if it would work on a deeper dent but I'm considering trying it on my 7R - the worst that could happen is it doesnt do anything and you are back to square 1...
http://www.metacafe.com/watch/820799/secret_paintless_dent_removal_technique_easy_and_c heap/
http://www.autoblog.com/2007/05/29/video-car-dent-removal-with-hair-dryer-and-compressed-air/