I’ve been quite disappointed by the progress made towards JSR 170 compliance. I was never very hopeful but this has been worse than I expected. Of the commercial product vendors, only Day has a product that is JSR 170 compliant. But then Day has been leading the effort and it is to be expected of them. Day have also created a connector for Documentum and connectors for different other commercial products are under development but then this is an effort by Day and not by those vendors.
The situation with Open Source, although slightly better, is still far from being as good as it should be. Magnolia is the only product that has a decent support for JSR 170. However, its Document Management offering is not Open Source. Alfresco, the newest Open Source product in this space has made its repository JSR 170 compliant, although very reluctantly. They only support level 1 though and support for level 2 will soon be there in future versions.
I hope the situation will improve soon and more products will start supporting JSR 170 (and JSR 283, which is an improvement over JSR 170).
Updated March 01, 2006
Alfresco 1.2 has been released. It now supports JSR 170, level 2.