KGTK is a wrapper utility that allows GTK applications to use the native KDE file open/save dialogs. I cannot stand the GTK/Gnome dialogs, and I this helps apps like Firefox maintain a consistent appearance with KDE.
I’ve packaged the latest release, 0.10.0, for Ubuntu Hardy amd64 and i386. It is available in my repository now. Source packages are provided, so any other Debian-based distro or architecture should be able to build it.