Bob--for long night exposures try XR-1. I've been trying to get it to work as a high-speed developer for normal contrast situations, and I haven't been satisfied ultimately, but it does get a lot of speed (about 2 stops of real shadow detail), and keeps contrast relatively low. It didn't work well for what I wanted, but I think it has a lot of potential for night photography. Check out the thread I started here in the B&W Film and Processing forum (search on XR-1 in the title), and the article on unblinkingeye.com for info.