When did you last try it?
Good point. Perhaps it's time to another try - the occasion could not be better, as I'm changing job and I need to setup a new development box (I need a notebook, and I have no need to another MacOS machine in house - I own a Mac Mini).
Since I *REALLY* backuped that last Gnome 2 installation, I will compare my current workflow on MacOS X to that installation (since it's still be best development box I have memory), and also to Gnome 3.
I"m not sure what you mean by multi-headed?
Multiple monitors acting as a single, large and asymmetric one.
The best setup for me would be 3 monitors: 2 in landscape for code, monitoring, debugging and some GIMPing (and emailing and video), and a third, smaller one on portrait for issue tracking, browsing and documentation. But two monitors in landscape are enough - a bit less comfortable, but that's all.
One of the troubles Gnome 3 caused to me was the default behaviour of one desktop per monitor, so switching desktops would change only one display - again, good for multiple content consumption, but terrible for context switching (content producing).
I know that there's a configuration option on some