Rumble-Touch side-by-side with iPhone

Here is a side-by-side view of the Rumble-Touch with an iPhone. This was an early version of the Rumble-Touch hardware and you can see the faint ITO (Indium Tin Oxide) pattern in the touchscreen surface. This has since been corrected, and now looks very good.
See http://en.wikipedia.org/wiki/Touchscreen#Capacitive for an overview of this technology.