POGS has officially completed their research as announced in this post on their news forum.
I'm a little bit sad to see the project come to a close but the project has produced a very large set of data for further research projects and I am glad to have contributed my share of computer time toward this goal.
There are still some work units in the pipeline awaiting validation but there has been no new work for several days now and there is not likely to be any more work released in the future.
I think It would be worth monitoring POGS' grey-list status in the coming days to see that the grey-list process is working as intended.
Goodbye POGS