Pool codes still needs further modification to find the optimal limit for hashrate per address, So yes they are still under testing.
The sourcecode will be released with all other repos when its ready. People just hate to wait, we understand that. But majority want a working blocks flow.
Everyone is free where they want to mine. For meantime there is 2 official pools where we can reward the miners in case there will be delay in the blockchain.
Official pools are:
http://alpha.ultranote.orghttp://beta.ultranote.orgthese two pools are much better:
https://www.xunpool.party/http://sebseb7.github.io/xun (zero fee)
the official pool is finding blocks only slowly, the other pools are much better, they make most of the blocks.
no hashrate limit.