Activities and the move to context-oriented desktops

I have organized my desktop to have multiple desktops (actually 45), that I can easy switch to by single keypress. It is not the ideal context-oriented desktop, but as close as one can using fvwm window manager:

http://skliarie.blogspot.com/2008/11/my-45-workplaces.html

I think fvwm would allow do further customization to change the FvwmButtons menu in the corner to be activity-specific (for the particular workplace to include the most used buttons and automatically open most frequently used windows for the activity), but for fvwm it would be is manual process which I would like to avoid.

What a pity gnome is not as customizable as fvwm and the technology of'95th is better than 2009th for me...