Last time I talked about a desktop on NCP, it was about Gnome. Continuing work on the desktop by community members in Nexenta now allows for XFCE on NCP2.
To get this desktop running on your Nexenta install, run
apt-get install xorg
#configure X (or copy a working xorg.conf file over)
apt-get install xfce4
Once done, you can start the desktop runnign startx. To install a login manager, run
apt-get install gdm