I've watched episodes one to twenty-six of DTB, thus, finishing the show. Apparently a new DTB show just aired in Japan, according to Wikipedia, but there isn't any information on it.
Darker than Black: Ry?sei no Gemini - Wikipedia, the free encyclopedia
EDIT: Ah, I now know what you mean by season two. /shot No, I haven't watched any of it. But I expect to start watching within the next ten or so minutes. xP