The work is being done by a subcommittee of the FIUV Council, the Liturgy and Spirituality Subcommittee, whose Moderator is Dr Joseph Shaw, a FIUV Council member and the Chairman of the Latin Mass Society.
The latest paper, No.18 was published at the end of January. This discusses 'The Dialogue Mass.'
I have combined all the papers thus far (1-18) into a single PDF file, it is 3MB in size and you can download it here.