There hasn't been anything official on this and it's a lot of hearsay and rumor, but there has been some word out that the board held an emergency meeting last night at a hotel in Haydock. What the main objective of the meeting was is unknown, but being so soon after a crushing defeat to Liverpool there is only so much guessing one would need, especially with the pressure on manager Roberto Martinez escalating rapidly.
There has also been some rumor that the board was upset with Jon Woods for leaving the game early after Everton fell behind 3-0 in the game. That seems like aiming your sights at the wrong target in my opinion.
It's tough to say how much of this talk is true with no club sources reporting on it, but it's not a surprise in any case.
I think the board were actually leaning toward keeping Martinez for next season, but when the players quit on him during the derby it was clear that he's not the man to lead this team. With only a day left until the semi finals against Manchester United I don't think Martinez is getting sacked today, but Sunday after a loss to Manchester United is probably a sure thing now.