depends on the scope of your project and how big you really think it can get. if its a niche thing for poker or other affiliates and wouldn't become mainstream then i wouldn't worry about it. if it has a chance to be covered by/advertised in mainstream media channels etc then i think it would probably be a big mistake to hamstring yourself with this. branding is expensive. even if you are in the right, knowing you have a deep pocketed and litigious enemy out their waiting to pounce, i'd avoid it and find a clever name =)
fourhourworkweek.com is another one i just thought of.