+1 for scrollbar, maybe cover proximity sensor to make it pop out large enough from the side for finder use? There is one in the standard notes app (as you cannot drag the text, that just highlights) but it is very slim so not easy to grab first time.

I would also say this would be handy on the web browser too, the amount of times i've accidentally clicked on a link when all I wanted to do was move the page around can be quite annoying..

Oh and thanks for the Mappero reminder, I'd seen it crop up before, not sure why I'd never downloaded it before but it seems very good indeed (as it should, using the google maps API), leaps ahead of the standard maps, where searching for a postcode got me nowhere, even though some of the locations it does find include a postcode...