[Discover] HowTo: theme your desktop - Ubuntu Forums http://ubuntuforums.org/showthread.php?t=203093
(ubuntu theme desktop tutorial) 
[Discover] GNOME-Look.org http://www.gnome-look.org/ (linux gnome wallpaper themes)
[Discover] KDE and Gnome Comparison http://www.psychocats.net/ubuntu/kdegnome (ubuntu kde gnome comparison)
[Discover] Ubuntu Installation - Beagle http://www.beaglewiki.org/index.php/UbuntuInstall (search beagle linux gnome)
[Discover] Matthew East http://www.mdke.org/blog/FirefoxGnome.html (gnome integration firefox)
[Discover] GNOME-Look.org http://www.gnome-look.org/ (linux gnome wallpaper themes)
[Discover] KDE and Gnome Comparison http://www.psychocats.net/ubuntu/kdegnome (ubuntu kde gnome comparison)
[Discover] Ubuntu Installation - Beagle http://www.beaglewiki.org/index.php/UbuntuInstall (search beagle linux gnome)
[Discover] Matthew East http://www.mdke.org/blog/FirefoxGnome.html (gnome integration firefox)