QUOTE(throwingks @ Oct 11 2006, 12:36 PM)

I'm not exactly sure either. But, I thought the Xbox 360 service was always on. I'm not sure if when you press the Guide button, it loads the GUI all over again or just calls on it.
QUOTE(KAGE360 @ Oct 11 2006, 01:25 PM)

i dont know about the entire dash, but i thought that the guide was always running in the background at least.
From my understanding the Guide and the Dash are two completely separate applications if you will. The guide handles functions such as alerts, text messaging, voice messaging, basic personal settings and music streaming
the dash handles media center extending, audio ripping, launching of XBLA games, content delivery, system settings, video playback, audio plaback with full screen visualizations, etc.
I'm fairly certain the Guide is an application itself that is always running, and the Dashboard is a 2nd application that runs only when you're not playing a game.