Oh, and here are all the possibly relevant processes:
nx 6380 0.4 0.1 245244 64452 ? Sl 12:18 0:07 /usr/NX/bin/nxserver.bin --localsession
nx 17634 0.3 1.2 1186584 630432 ? Sl Nov15 7:37 /usr/NX/bin/nxserver.bin -c /etc/NX/nxserver --login -H 6
nx 23141 0.0 0.1 238288 57540 ? Sl Nov15 0:03 /usr/NX/bin/nxserver.bin root 23128 --startup
nx 23148 0.0 0.0 485348 6580 ? Sl Nov15 0:00 /usr/NX/bin/nxd
nx 27708 0.0 0.1 616340 58200 ? Sl Nov15 0:01 /usr/NX/bin/nxserver.bin -c /etc/NX/nxserver --login -H 6
nx 32302 0.2 0.1 616736 60456 ? Sl 12:13 0:04 /usr/NX/bin/nxserver.bin -c /etc/NX/nxserver --login -H 6
mtoossi 2217 3.7 0.0 68124 9416 pts/2 S 12:45 0:00 /usr/bin/Xvfb :0 +extension RANDR -nolisten tcp -auth /home/mtoossi/.serverauth.12956
mtoossi 2836 0.0 0.0 243740 6812 pts/6 Sl+ 12:45 0:00 gnome-session
mtoossi 2839 0.0 0.0 18144 660 pts/6 S+ 12:45 0:00 dbus-launch --exit-with-session gnome-session
mtoossi 2840 0.0 0.0 19732 888 ? Ss 12:45 0:00 /bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session
mtoossi 2843 0.0 0.0 128924 2924 ? S 12:45 0:00 /usr/libexec/gconfd-2
mtoossi 2849 0.0 0.0 161168 2116 pts/6 Sl+ 12:45 0:00 gnome-keyring-daemon --start
mtoossi 2852 0.3 0.0 553088 10044 ? Ssl 12:45 0:00 /usr/libexec/gnome-settings-daemon
mtoossi 2859 0.0 0.0 231552 7264 pts/6 S+ 12:45 0:00 metacity