|The pletora of small lightweight file manager out there seems to demonstrate that many peoples (including me ) are unhappy with the current tendence to integrate everithing in the file manager. (OK, many others (most?) are just fine with that. Good for them).
After a long search, I finally settled on ROX-Filer. It is a nice GTK-based filer which started as a clone of Risc OS filer app, then evolved on its own.
Fast, nice-looking, feature-full and well keyboard integration (I just love the way the directory text entry interacts with the graphical part of the file manager).
No official debian packages, yet, but unofficial ones are at http://www.janw.easynet.be/rox/. And there is always the source, at http://rox.sourceforge.net/.