Tactile Plus - Button Stickers

[Guest jt!]

After playing a fair few games recently with on screen button overlays i've noticed how much i have to concentrate on where the buttons are on the screen, which made me think of these little sticker type buttons i saw on engadget a while back, link here

Has anyone ever tried these? also anyone know where you can buy them, i've trawled google and ebay to no avail.

cheers,

Jt.