I have an old laptop (PII-400Mhz, 196Mb RAM, it’s small & light, which is why I still keep it around), it used to run Debian Woody just fine, I wiped it recently and dropped Debian Sarge on to it, it just seemed sluggish, I reckoned it couldn’t cope with all the new graphical schmuck in the new GNOME release.
One of the things I liked about Sawfish/Sawmill was the pack window feature, I can be quite keyboard orientated and liked to be able to bounce windows round without have to jump for the mouse.