Thanks to the worthy advice of those on the board, I applied a small amount of anti-seize lube to the backs of the rear brake pads and, shhhh.  It's totally quiet.  I had also installed those shims incorrectly and got that sorted. Thanks all.

I need to do this too...

Hardware store sells about a 1lb can of high-temperature grease (blue in color) that can be used for a variety of lubrication applications (swingarm, brake pads, wheel axles).
You can buy 35 gallons of the stuff for only $735. Imagine the fun you could have at parties with that much high temp silicone grease.
http://www.grainger.com/Grainger/JETLUBE-Grease-16W689

I already have some of this stuff that I got at AutoZone last year for my car brakes.

http://www.amazon.com/CRC-Disc-Brake-Quiet-05016/dp/B000CINV88