They cost $50.00 each when ordered from HP's website, and charge touchstone-compatible webOS devices inductively -- by just setting it on the charger rather than mess with any cords.
|Exhibition Mode - Time|
The phone will remember touchstones uniquely, so one touchstone can be programmed to be an alarm clock, while another can be set to be a photo slideshow.
|Agenda View in landscape mode; Exhibition can|
be used in either portrait or landscape modes
Source: HP's Official Website