Would like to know if there is a new version of mozart/oz currently it is 1.4. That was in 2008. There has to have been progress.
Yes, 1.5.0 appears to be available here: http://gforge.info.ucl.ac.be/projects/mozart/ although the tags from the download page call it 1.4.99.
I'm not sure why you believe that "there has to have been progress"; projects get abandoned or shelved all the time. Sometimes, a mature project is sufficiently "done" that no one is interested in working on it any more.