Hi,

yes, this is a huge feature request, but nevertheless I always found the tools who offer a network diagram helpful. (This could also be an optional plugin thats only compiled when graphviz (for the layout) support is detected). A network diagram is often helpful to identify optimizations for bigger projects.

To tell you what I mean, I googled for some images on the net, hopefully they will be still there after a while:
http://www.valoryempresa.org/graphics/albums/DIR/Project_Management/tiempo/normal_6.5_project_network_diagram.jpg
http://image.versiontracker.com/scrnsht/50496/159428/852pert.png
The view of the layouts should maybe be customizable, and something should be invented regarding printing such a beast out.