Fixed in Zcash 1.0.3. (They were always "working", despite the bugs that were recently fixed. You can see plenty of successful z-address transactions on the blockchain.)
Re:Keybase chooses Zcash
by plasticmachine on Friday November 18, 2016 @10:05AM
(#12987191)
You had a single thing with ZCash that you had to get right, and you couldn't get it working in your initial release? What an utter embarrassment.
http://zcash.flypool.org
If anonymity is so important for people, there are already excellent solutions, Monero being one of the best, if not the best, with a strong and serious dev team.
Disclaimer: I am not a Monero dev and I own a huge total of 0.6 XMR. This is only my opinion as a software dev.