ExternalDocValuesFilterReader progress?

[Ryan McKinley]

In march, there was so effort at looking at cleaner ways to integrate
external data:

http://mail-archives.apache.org/mod_mbox/lucene-dev/201303.mbox/%3cc2e7cc37-52f2-4527-a919-a071d26f9...@flax.co.uk%3E

Any updates on this?

Thanks
Ryan