GM Var Akobian wearing Endgame
Jeremy Popoff, guitar player from the platinum selling rock band, Lit ( www.myspace.com/litlounge ), wearing Endgame.
Blog reader John O'Brien has some fantastic chess designs for sale here.
He also has a corresponding blog that centers around chess and its current place in pop culture. I don't know him personally, but he donated money for my kid who couldn't pay for Nationals, so I figure he's a good guy who deserves your business. Plus his shirts are hot.