We (Flexpool) have launched our testnet at iron.fpmp.net:8888
For bzminer you can use bzminer -a ironfish -w ironwallet -p stratum+tcp://iron.fpmp.net:8888 --nc 1 --a2 zil --w2 zilwallet --p2 zmp://zil.flexpool.io for Iron Fish+ZIL dual mining
ZIL pays around 10x more than any other GPU coin for the 2 minutes every 60 minutes it runs so it's likely to be a large income boost for Iron mining as well (but you can just mine Iron alone if you prefer).
Our (nodeless) light wallet guide is pinned in our discord.
Mainnet launches April 20th so mining now is just to get your rigs ready for mainnet.
https://discord.gg/38cX8edR