I haven't got confirmation yet but I think I found what we are looking at.
Wikipedia -Silicone rubber keypad (http://en.wikipedia.org/wiki/Silicone_rubber_keypad)
Show Image
(http://upload.wikimedia.org/wikipedia/en/b/b7/Silicone_keypad_key_design.jpg)
"It is possible to vary the tactile response and travel of a key by changing the webbing design and/or the shore hardness of the silicone base material. Unusual key shapes can easily be accommodated as can key travel up to 3mm. Tactile forces can be as high as 500g depending on key size and shape."
This one is not bad either from RSP Silicone Keypad (http://www.rspinc.com/silicone-keypad-8.htm)
Show Image
(http://www.rspinc.com/fck/image/rk-guide_clip_image003.jpg)
Apparently this design is good for >10 million actuations. But how much more...
So... Is this the dome you had in mind?
It's it a normal silicon/rubber covered rubber dome keyboard, AKA foldable keyboard?
http://tinyurl.com/4mbkwcf (http://tinyurl.com/4mbkwcf)
(http://www.modsynergy.com/Modsynergy%20files/EumaxFold3000B-front.jpg)
Or may be it only marketed in Asia region... Feel extremely bad to type on or even press down the keys...
EDIT: Oh wait, just realise that now they fixed the base support for the keyboard and it no longer foldable... May be now it is better to type on.