there are still kojaks listed as available online, in 700c. The schwalbe site has the 700c, in folding bead only, listed among their products, but the North america site has them listed as "out". This has been a popular tire for schwalbe, so i'd be surprised if they don't bring another run out sometime soon.
But, to echo what everyone else said: kojaks are the first thing that comes to mind for fat, fast 700c tires.
-rob