I'm looking at the Mozilla example on my laptop without a mouse, and I get a little bit annoyed when I'm hovering a certain node trying to click on it and the visualization keeps on moving and makes it hard to click on it. So maybe it could be possible to have a simple option to freeze the view?

And maybe an easy way of instantly changing to some near optimal viewpoint for viewing the data in terms of a given axis? (Ie. CPU or memory usage).

But this, combined with normal alerts would be cool. Oh, and what about showing trace lines once I've selected a given node? :)