For those who might want a more full featured touch feedback solution on the Imagio, check out Touch Response over at XDA-Developers.
http://forum.xda-developers.com/showthread.php?t=450256
Unlike the HTC app, this works for the entire device and all apps. You can set it to disable during phone calls, disable when set to silent, disable when locked, or enable only for keyboard. You can also customize the amount of vibrate on touch and release per your own tastes. Works great. Once installed it shows up in Settings -> System. Give it a try. I disabled the TouchFLO touch setting after installing this, though it didn't seem to have any conflict with both enabled.
And for what it's worth, I use 24ms Touch and 16ms Release settings.
Edit: Oh and I should also mention that I have seen no effect on battery life after using this for several weeks now.