24 or 25 ???

As you probably heard, Canon 5DII is going to have a firmware update allowing it to shoot both 24, 25 and 30 fps. That makes things much complicated: should we shoot 24 or 25 fps? I recently read in an online article that in Norh America there is a trend toward shooting 25 fps.

I know, the firmware is going to be in the first half of 2010, but I start wondering right now: what should I shoot, 24 or 25 fps?

I'm going to continue to shoot at 30fps.
But I wouldn't shoot anything at 24fps for stock.