few days ago people were talking about trackpads...

i remember the samsung omnia having something like that.



it functioned as a button and swiping over the button it functioned as arrow keys (depending on direction of swipe).

you could activate 'mouse-mode' in settings which would enable a mouse arrow on screen and then swiping over it would move the mouse arrow (it was running windows mobile), like an actual trackpad, pushing the button = clicking the 'mouse'.

it worked surprisingly well as arrow keys, only sometimes used it in mouse-mode (when i was surfing and there were too many tiny links next to each other to press comfortably with fingers without pressing on the wrong one).

htc desire z had a similar button although i'm not sure it had the same funcionality

after the omnia i got me the n900 and ended up on this place... ahhh nostalgia.