In case you're wondering what I'm up to...
Anyway, this video shows only some of the features to be included:
Custom nodes: built-in shapes are none, circle, square, rectangle, ellipse, among others
Custom edges: built-in shapes are none, line, quadratic, bezier, arrow, among others
Custom Animations: linear, Quart, Bounce, Elastic, Back, etc.
Change tree orientation: already possible in 1.0.8a.
Unfortunately my video card isn't very good, so the video quality and fps aren't as good as I'd wanted.
Animations are pretty smooth though, as you can see for yourself, so don't blame the library, blame my computer!
Anyway, here's the video:
Another cool thing is that you can also create custom node and edge rendering functions :)
Stay tuned, there are more features to come!