I'm certain the Pandora touchscreen is resistive. Resistive touchscreens cannot do multitouch, but they can do a half-assed pressure sensing.
Resistive screens work by having two electrically conductive sheets of plastic sitting on top of the screen, but not quite touching each other. When you touch the screen you are pressing the top layer down so it contacts the lower layer. Based on the resistance measured between the upper and lower layers, the device can calculate the location of contact. The down side is that the resistance can be thrown off by things like heat, moisture and time, so occasional recalibration is necessary.
Pressing harder on the top layer will cause more of it to contact the lower layer, and this will change the resistance of the connection. Based on this change, the device can infer the amount of pressure applied. There are significant inaccuracies in this method, though. For instance, a light tap with something wide and soft (like a fingertip) will cause a larger contact patch then even a very hard tap by something small and hard (like a stylus). This makes useful pressure sensitivity much more problematic, though not impossible.
