You can scroll by holding down the middle trackpad button with your thumb and pushing the trackpoint in one direction or the other. You can even scroll horizontally this way. This is the main reason for the complaint about the missing middle button.
Why would anybody use a laptop keyboard and no mouse for serious development work? It's always an ergonomic nightmare.
Of course when travelling light you might choose to leave extra stuff at home. But how many of us need to travel light to a new location before starting their daily work?
