Don’t panic if you plug the screen to the Raspberry Pi and you get only a white screen: The configuration is a little bit tricky because you need to use a custom kernel or download a prebuilt image that you can download for sure from Adafruit or your reseller.
There are also some issues about touchscreen calibration. You must run the ts_calibrate utility and change the xorg configuration to fix it.
And voilà! 🙂