Comment 12 for bug 340036

Fwiw, I implemented "defer to ..." options in the right click context menu, available in my branch here:
https://code.edge.launchpad.net/~bryceharrington/gtg/start-tasks

It's really useful, I can do what I described in comment #10 easily now.

A custom timeline ribbon UI that you could drag/drop tasks onto would be pretty sweet but it sounds like it'd take a lot of programming work to create it.