Yes there is blakecoin that is based on the new sha-3 algo
But blake is only SHA-3 finalist, while keccak is SHA-3 winner, so Keccak = SHA-3, but Keccak != Blake.
Although the functions are similar with regard to their speed/performance, so I guess we should expect similar gap between CPu and GPU mining here too (roughly 300-500x faster with GPU).