Scrolling works well with the small scrollbar on the right.
Keyboard shortcuts are:
P for scrolling up
L for scrolling down
Arrow keys (up and down) for oldschool navigation like S40-S60
Arrow keys (left and right) for previous and next pages
G for URL's
S for bookmarks menu
On N900 you must disable Hildon Composition to boost performances while using Links2:
Ctl + Shift + N