As an extra data point, I got this while using the gnome shell, not unity.
$ ps uxe | grep [u]buntuone-client 1000 4335 1.1 0.7 84652 31456 ? Sl 21:21 0:01 /usr/bin/python /usr/lib/ubuntuone-client/ubuntuone-syncdaemon SHELL=/bin/bash DBUS_STARTER_ADDRESS=unix:abstract=/tmp/dbus-E3LDd5g40Q,guid=a0f6c776809503c0674ee73b00000262 XDG_SESSION_COOKIE=ccee91d71055e5eefb2ada9e02520d2d-1316146867.3030-1374822963 XDG_CURRENT_DESKTOP=GNOME DISPLAY=:0 XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session2 DEFAULTS_PATH=/usr/share/gconf/gnome-shell.default.path DESKTOP_SESSION=gnome-shell SESSION_MANAGER=local/runt:@/tmp/.ICE-unix/4052,unix/runt:/tmp/.ICE-unix/4052 SSH_AUTH_SOCK=/tmp/keyring-5VW59a/ssh LC_MESSAGES=en_US.UTF-8 PATH=/home/darkstar62/bin:/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games LC_CTYPE=en_US.UTF-8 GNOME_DESKTOP_SESSION_ID=this-is-deprecated GDMSESSION=gnome-shell USERNAME=darkstar62 GTK_MODULES=canberra-gtk-module:canberra-gtk-module XDG_DATA_DIRS=/usr/share/gnome-shell:/usr/share/gnome:/usr/local/share/:/usr/share/ UBUNTU_MENUPROXY=libappmenu.so LANGUAGE=en_US:en GPG_AGENT_INFO=/tmp/keyring-5VW59a/gpg:0:1 DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-E3LDd5g40Q,guid=a0f6c776809503c0674ee73b00000262 SSH_AGENT_PID=4089 XAUTHORITY=/home/darkstar62/.Xauthority USER=darkstar62 XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0 MANDATORY_PATH=/usr/share/gconf/gnome-shell.mandatory.path DBUS_STARTER_BUS_TYPE=session GNOME_KEYRING_PID=4050 PWD=/home/darkstar62 LANG=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 GNOME_KEYRING_CONTROL=/tmp/keyring-5VW59a XDG_CONFIG_DIRS=/etc/xdg/xdg-gnome-shell:/etc/xdg HOME=/home/darkstar62
$ echo $DBUS_SESSION_BUS_ADDRESS unix:abstract=/tmp/dbus-E3LDd5g40Q,guid=a0f6c776809503c0674ee73b00000262
As an extra data point, I got this while using the gnome shell, not unity.
$ ps uxe | grep [u]buntuone-client ubuntuone- client/ ubuntuone- syncdaemon SHELL=/bin/bash DBUS_STARTER_ ADDRESS= unix:abstract= /tmp/dbus- E3LDd5g40Q, guid=a0f6c77680 9503c0674ee73b0 0000262 XDG_SESSION_ COOKIE= ccee91d71055e5e efb2ada9e02520d 2d-1316146867. 3030-1374822963 XDG_CURRENT_ DESKTOP= GNOME DISPLAY=:0 XDG_SESSION_ PATH=/org/ freedesktop/ DisplayManager/ Session2 DEFAULTS_ PATH=/usr/ share/gconf/ gnome-shell. default. path DESKTOP_ SESSION= gnome-shell SESSION_ MANAGER= local/runt: @/tmp/. ICE-unix/ 4052,unix/ runt:/tmp/ .ICE-unix/ 4052 SSH_AUTH_ SOCK=/tmp/ keyring- 5VW59a/ ssh LC_MESSAGES= en_US.UTF- 8 PATH=/home/ darkstar62/ bin:/usr/ lib/lightdm/ lightdm: /usr/local/ sbin:/usr/ local/bin: /usr/sbin: /usr/bin: /sbin:/ bin:/usr/ games LC_CTYPE= en_US.UTF- 8 GNOME_DESKTOP_ SESSION_ ID=this- is-deprecated GDMSESSION= gnome-shell USERNAME=darkstar62 GTK_MODULES= canberra- gtk-module: canberra- gtk-module XDG_DATA_ DIRS=/usr/ share/gnome- shell:/ usr/share/ gnome:/ usr/local/ share/: /usr/share/ UBUNTU_ MENUPROXY= libappmenu. so LANGUAGE=en_US:en GPG_AGENT_ INFO=/tmp/ keyring- 5VW59a/ gpg:0:1 DBUS_SESSION_ BUS_ADDRESS= unix:abstract= /tmp/dbus- E3LDd5g40Q, guid=a0f6c77680 9503c0674ee73b0 0000262 SSH_AGENT_PID=4089 XAUTHORITY= /home/darkstar6 2/.Xauthority USER=darkstar62 XDG_SEAT_ PATH=/org/ freedesktop/ DisplayManager/ Seat0 MANDATORY_ PATH=/usr/ share/gconf/ gnome-shell. mandatory. path DBUS_STARTER_ BUS_TYPE= session GNOME_KEYRING_ PID=4050 PWD=/home/ darkstar62 LANG=en_US.UTF-8 LC_COLLATE= en_US.UTF- 8 GNOME_KEYRING_ CONTROL= /tmp/keyring- 5VW59a XDG_CONFIG_ DIRS=/etc/ xdg/xdg- gnome-shell: /etc/xdg HOME=/home/ darkstar62
1000 4335 1.1 0.7 84652 31456 ? Sl 21:21 0:01 /usr/bin/python /usr/lib/
$ echo $DBUS_SESSION_ BUS_ADDRESS /tmp/dbus- E3LDd5g40Q, guid=a0f6c77680 9503c0674ee73b0 0000262
unix:abstract=