I've also got 5,000 FUN tokens and I can't see a link anywhere (including the homepage). BTW - when did freebitco.in start accepting DOGE? I can see the benfits given the buzz surounding both it and bitcoin, but hadn't realised DOGE was also accepted. (can you deposit with one and withdraw via the other?)
They don't accept Dogecoin. There was a separate site owned by wetsuit that was called Free Dogecoin. It was also a dice site. They closed it down a few months ago.
If they added an altcoin to FreeBitco.in I think Doge would be an ideal choice due to it's low fees and decent level of adoption, especially amongst gamblers.