Also, MicroB is designed to scroll up & down when you *hold* up & down on the D-Pad. I'm not sure if the "hold" behavior transfers well over to a BT keyboard, though.

With Tear, a simple up or down will scroll, which is great. But with Tear you have to work around the bugs, including the fact that hitting left too many times in an edit box locks it up. Tap to move the cursor in an edit box.

Opera & Firefox both use swiping to scroll. Scrolling by keyboard doesn't work too well.