Sixty (60) days after the last publicly stated projection of when these aircraft could be expected to return to scheduled service (see a few posts above), today's Wall Street Journal publishes an article describing the projected return as occurring early next year, rather than the timing this summer previously hoped-for by United.
Article relates that Pratt & Whitney is continuing work on blade inspection methods (reportedly, ultrasound) and that Boeing is working on modification of the engine cover. Not new information itself, IIRC.
United executive quoted as noting certain constraints on system flight ops imposed by continuing unavailability of these aircraft.