Some PFS3 news..
I started "small" project (with help from PFS3's author M.Pelt) that tries to extend PFS3 file and partition max allowed size. PFS-experimental branch in sourceforge SVN.
File size extension is already done (but with only very minimal testing), current limit is 128G but absolute (and mostly useless because partition size can't be that big) limit will be few hundred terabytes..
Partition size limit extension is more complex. New real world limit probably will be something from 1T to 2T or so. Coming later..
"Extended" PFS3 will of course keep "old" PFS3 partition support. Block level changes are small extensions that won't break compatibility.
When it is ready for real use? No one knows.