Can't remember the exact name of the van, but it is very easy to spot. There will be signs outside the main terminal. It is just a small mini-van--but it does have its name boldly printed on it's sides. Very easy trip to the city center this way, and the Marriott is about a block down from the stop. Upon exiting the van, go to your right to the corner of Neveski Republiski (sp), then make a left (same side of the street) you'll come right to the Marriott about a block down (you will see the Rennaissance directly across the street from it). Here's the link for the shuttle:
http://www.prague-airport-shuttle.com/
and for the airport:
http://www.csl.cz/en/sluzbyprovas/do...nipreprava.htm