The version of fluxbox
3.6 (which is 0.9.9) is rather interesting as they got rid of the tabs, but kept the tabbed windowing. I know, it sounds weird. Here's my current web desktop with three mozilla windows tabbed together and gaim's convo window hiding in the lower right hand corner:
(opens in new window)
See how the titlebar is now split up? Very very interesting. Looks like they took a cue from Ion
. Quite nice.