Looks like N712TW, which has been recently reconfigured to 75S, will be on JFL-SFO-JFK today. Anyway, I sure hope so or else my economy comfort seat evaporates :|.
I fly this route often and this is the first time it's scheduled to be on a reconfigured 757. The Sunday Night JFK->SFO was also supposed to be a 75S but they swapped it out last minute, leading to a few unhappy people in rows 23, 24, and 25.