Besides the common beige or black Pokerstars caps which dot the main tournament area (as sported by Vanessa Rousso et al.) there are some people who catch the initial roving eye because of their headwear - Isabelle Mercier has a pinstripe fedora, while Rolf Slotboom has his traditional snug enormous wooly hat. The winner has to be Katja Thater who was actually being complimented on her bizarre tan furry lampshade as I walked past her table.
That's one way of standing out and catching the eye of the many camerapeople who are multiplying daily here. The other is to be Boris Becker.