I've finally added basic Negotiate (Kerberos) support to libsoup. Git
is available here. Using:
git clone http://git.debian.org/?p=users/agx/libsoup.git;a=summary
# for nautilus:
you can protect your music, files, whatever on a webserver using
mod_auth_kerb and access them without storing a passwort just using your
Kerberos ticket. Would be nice to get this merged #587145.