Courtesy of David Lopez and Tracy's playful hordes, a time-lapsed view of last year's New Games / Snoopy Thanksgiving celebration - which you might find actually as useful as it is entertaining as you go about envisioning the world's first truly Big Card Game event.
To see the clip, click here and either download the zipped file (22.4 megs) or click and wait very patiently to see it online.
Mondo Croquet - played with bowling balls and sledge hammers.... (sent in as a comment to my story on Collosal Croquet)
A little semi-relevant inspiration from today's LA Times, this article "(Water) Gun-Toting Assassins" It's Just Some Urban Fun- points also to this website.
FY further I, see their rules for Capture the Flag. Not that you should necessarily abandon the "Big Games" concept, but rather to help you get an idea of how such an event is organized. Most fortuitous. Most relevant. And not exceptionally reverent.
FY Giant-Card-Designing I - see