Ok, finally found time to closer look into that. My POV:

Keep:
* fluxbox
* fvwm2
* openbox
* wm-ng (is just a simple wrapper script to start fluxbox with gkrellm and 
desktop
icons)

Considered for removal:
* dwm (would save 180kb)
* evilwm (would save 94,2kb)
* fvwm (would save 14,7MB)
* fvwm2-crystal (would save 5104kb)
* jwm (would save 299kb)
* pekwm (would save 1253kb)
* twm (would save 397kb)
* w9wm (would save 127kb)

Further discuss keep/removal of:
* awesome (would save 2785 + 446kb)
* rapoison (would save 528kb)
* wmii (would save 401kb)

Additional decisions to make:
* wm-ng as default instead of fluxbox?
* which WM using as default for x-window-manager (wm-ng vs. fluxbox vs. 
openbox)?

Further opinions?

regards,
-mika-