I had a chance to shoot some video on rides both Saturday and Sunday. Saturday on a 40-mile tour over mostly rural roads, helmet-mounted, and Sunday on an urban group ride, handlebar-mounted.
The handlebar mounting worked surprisingly well, even over some pretty rough patches through downtown Detroit. The only downside was that I picked up a lot of chain noise from my own bike (noise I can't hear when I'm riding!), plus the POV was a bit lower than might be ideal, but still not too bad overall. I might try that again using the standard backdoor instead of the skeleton backdoor I was using to see if that cuts down on the chain noise. I also had an issue with a brake cable showing up in the upper left of the frame.
The helmet-mounted footage from Saturday (helped greatly by some gorgeous weather!) came out very well too, with the exception of the aforementioned tilt. I have to mount located on the front of the helmet instead of the top - reduces the "dork factor" a bit, and hopefully provides a more stable platform for the camera.
I haven't sprung yet for the LCD Touch BacPac, but I've played with the WiFi "preview" on my iPhone, but it's a PITA - you have to turn on the WiFi, switch it to work with the iPhone instead of the remote, switch the phone to communicate with the camera, get everything set, then switch the WiFi back to the remote, switch the iPhone WiFi back to your local router instead of the camera AND REMEMBER TO TURN THE WiFi OFF on the CAMERA if you want to have any batter left after a half-hour!!

Still it allows you to verify that things are aimed and aligned properly.