Couldn't wait. Tore into the dash today, anticipating the PIE tomorrow or (gulp) Friday. Saturday we're off to the Grand Canyon, and my wife will not be pleased if I'm working on the truck all day while I'm supposed to be packing and whatnot.
To my pleasant surprise, it's not super-hard to get to this stage. An installation guide at
http://techinfo.toyota.com was well worth the $10 daily subscription. When I put 'er back together I'll post the order in which all the stuff has to be taken apart.
By the way, the ball on the right is a RAM Mount for my GPS, a Garmin GPSmap 76S. Since I had everything apart, I took the opportunity to tap a 12V line and pass power directly through the mount hardware, so the GPS power cord doesn't have to snake across the console and plug into the lighter socket. Click the RAM pic link in my sig to see the GPS mounted.
There's a ton of stuff that has to come out to get at the stereo, but it's not a killer if you're careful.
EDIT: By the way GYoter, check out
http://www.installer.com/aux/ for adding an AUX input to a non JBL system. I have not done business with them, but it looks like the right stuff.