Moblin Desktop how to logout + gnome-shell memory usage

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http://forums.fedoraforum.org – Hi friends, I recently installed F12 beta, and out of curiosity installed the Moblin Desktop environment. However i could not find any option to logout. I finally did a shutdown :) Anyone has any idea how to log out of moblin desktop Also i tried the gnome-shell. I seems to use a LOT of memory (RAM). While on gnome shell top gave me a usage of about 150 MB resident memory for mutter, and in addition there were some more memory guzzlers. Is it normal? Thanks (HowTos)