BayStaats livestreams its Ariadne this afternoon at 2pm ET, with Amber Wagner, Brenda Rae, and Alice Coote, right here.
The BSO's barnburning Elektra, with Christine Goerke in the title role, should be archived here sometime this week. You all should give it a listen.
And BBC 3 has Sarah Connolly's recital (or goodly bits thereof, anyway) from last May's Göttingen Festival.