One of the nice features of this ShakyPhone from Samsung is that the touchscreen provides tactile feedback:
Samsung is already acquainted with Immersion's VibeTonz—whose shaky vibrations (introduced a year ago) already accompany ringtones and a games in its more-conventional SCH-a870 clamshell rolled out last summer. But the idea to incorporate touch feedback for entries on a touchscreen is a new way to use the shaky stuff.The only serious disadvantage is probably the power consumption of this feature.
Price and availability of the SCH-W559 are unknown.