On current up-to-date precise:
precise@pangolin:~$ ps uxe | grep [u]buntuone-client precise 1728 1.2 2.5 91648 25620 ? Sl 21:00 0:02 /usr/bin/python /usr/lib/ubuntuone-client/ubuntuone-syncdaemon SHELL=/bin/bash DBUS_STARTER_ADDRESS=unix:abstract=/tmp/dbus-3nEQvR5NH6,guid=fe087e617e216ddb5212212b00000026 XDG_SESSION_COOKIE=fa18bc7409aa2f6f8eb065ff0000000d-1329443985.814226-1074920670 XDG_CURRENT_DESKTOP=Unity DISPLAY=:0 XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0 DEFAULTS_PATH=/usr/share/gconf/ubuntu.default.path DESKTOP_SESSION=ubuntu SESSION_MANAGER=local/pangolin:@/tmp/.ICE-unix/1212,unix/pangolin:/tmp/.ICE-unix/1212 SSH_AUTH_SOCK=/tmp/keyring-06GYzf/ssh LC_MESSAGES=en_US.UTF-8 PATH=/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=ubuntu GTK_MODULES=canberra-gtk-module:canberra-gtk-module XDG_DATA_DIRS=/usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/ UBUNTU_MENUPROXY=libappmenu.so LANGUAGE=en_US:en GPG_AGENT_INFO=/tmp/keyring-06GYzf/gpg:0:1 DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-3nEQvR5NH6,guid=fe087e617e216ddb5212212b00000026 SSH_AGENT_PID=1249 XAUTHORITY=/home/precise/.Xauthority USER=precise COMPIZ_CONFIG_PROFILE=ubuntu XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0 MANDATORY_PATH=/usr/share/gconf/ubuntu.mandatory.path DBUS_STARTER_BUS_TYPE=session PWD=/home/precise GNOME_KEYRING_CONTROL=/tmp/keyring-06GYzf LANG=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 XDG_CONFIG_DIRS=/etc/xdg/xdg-ubuntu:/etc/xdg HOME=/home/precise LOGNAME=precise
precise@pangolin:~$ echo $DBUS_SESSION_BUS_ADDRESS unix:abstract=/tmp/dbus-3nEQvR5NH6,guid=fe087e617e216ddb5212212b00000026
On current up-to-date precise:
precise@pangolin:~$ ps uxe | grep [u]buntuone-client ubuntuone- client/ ubuntuone- syncdaemon SHELL=/bin/bash DBUS_STARTER_ ADDRESS= unix:abstract= /tmp/dbus- 3nEQvR5NH6, guid=fe087e617e 216ddb5212212b0 0000026 XDG_SESSION_ COOKIE= fa18bc7409aa2f6 f8eb065ff000000 0d-1329443985. 814226- 1074920670 XDG_CURRENT_ DESKTOP= Unity DISPLAY=:0 XDG_SESSION_ PATH=/org/ freedesktop/ DisplayManager/ Session0 DEFAULTS_ PATH=/usr/ share/gconf/ ubuntu. default. path DESKTOP_ SESSION= ubuntu SESSION_ MANAGER= local/pangolin: @/tmp/. ICE-unix/ 1212,unix/ pangolin: /tmp/.ICE- unix/1212 SSH_AUTH_ SOCK=/tmp/ keyring- 06GYzf/ ssh LC_MESSAGES= en_US.UTF- 8 PATH=/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=ubuntu GTK_MODULES= canberra- gtk-module: canberra- gtk-module XDG_DATA_ DIRS=/usr/ share/ubuntu: /usr/share/ gnome:/ usr/local/ share/: /usr/share/ UBUNTU_ MENUPROXY= libappmenu. so LANGUAGE=en_US:en GPG_AGENT_ INFO=/tmp/ keyring- 06GYzf/ gpg:0:1 DBUS_SESSION_ BUS_ADDRESS= unix:abstract= /tmp/dbus- 3nEQvR5NH6, guid=fe087e617e 216ddb5212212b0 0000026 SSH_AGENT_PID=1249 XAUTHORITY= /home/precise/ .Xauthority USER=precise COMPIZ_ CONFIG_ PROFILE= ubuntu XDG_SEAT_ PATH=/org/ freedesktop/ DisplayManager/ Seat0 MANDATORY_ PATH=/usr/ share/gconf/ ubuntu. mandatory. path DBUS_STARTER_ BUS_TYPE= session PWD=/home/precise GNOME_KEYRING_ CONTROL= /tmp/keyring- 06GYzf LANG=en_US.UTF-8 LC_COLLATE= en_US.UTF- 8 XDG_CONFIG_ DIRS=/etc/ xdg/xdg- ubuntu: /etc/xdg HOME=/home/precise LOGNAME=precise
precise 1728 1.2 2.5 91648 25620 ? Sl 21:00 0:02 /usr/bin/python /usr/lib/
precise@pangolin:~$ echo $DBUS_SESSION_ BUS_ADDRESS /tmp/dbus- 3nEQvR5NH6, guid=fe087e617e 216ddb5212212b0 0000026
unix:abstract=