New DE: lxde
Today I switched from Xfce to LXDE: the first impression is: wow.
It's really fast, and it seems lacking no functionality from what I had on Xfce (probably some, but I just installed it like 10 minutes ago, and I still need to find out all its potentialities :-) ).
It's based on OpenBox as window manager, which was originally derived from BlackBox. Since version 3.0, it has no code from BlackBox anymore :-)
I'll post my impressions after some use... I really like it -- I always preferred speed over beauty. ;-)