Mobile phones, it seems, are the advance guard for mobile-broadband networks that will extend internet access to the whole of mankind.

ECONOMIST: Finishing the job

And the advance guard of this revolution is neither a console nor a computer, but a flat, thin, palm-sized piece of plastic.

CNN: ASIANOW - Asiaweek

The avant-garde (literal translation, advance guard) valiantly leads the rest of the culture into the uncharted future.

FORBES: The 21st Century Novel: Jaded Ibis Sees a 'Mashup'

The BBC's Sarah Grainger in Caracas says it appears that prisoners who had heard about the search in advance from news reports were waiting for the National Guard when they arrived.

BBC: Venezuela prison riot 'kills many'