If you're looking to stay up to date on infinity next, then following josh's twitter has always been the best way to do that.
https://twitter.com/8ntech
Its also a good idea to keep an eye on the official 8chan twitter as well.
https://twitter.com/infinitechan
I guess you could also follow copypastes own twitter, if you want to see what he's up to.
https://twitter.com/HW_BEAT_THAT
Within regards to the current state of infinity next, then you can find info on that in the most recent transparency report.
https://8ch.net/_t/20160118.txt
>8chan software migration is currently in limbo. Two efforts are underway, one to hack a front end controller into vichan/infinity (current stack) so as to extend the life of the current software in regards to smaller boards not on their own NFS server, and Josh continues to work on Infinity Next details of wihch can be found on his Twitter https://twitter.com/8ntech
>Any vichan/infinity hack is not a Next replacement, it simply moderately increases the quality of life for 8chan users while a more robust solution can be worked on. Two hacks don't make a right.