Is anyone else using SV2 yet? (Not a rhetorical Q, I vaguely recall reading someone saying they were using it, but I forgot where). 

 I believe there is only one pool currently doing Sv2 - https://dmnd.work/ which was also only announced this week. 

 With work selection, that is. Braiins (formerly slush) pool has done Sv2 for a long time but never supported custom work afaik.