I would like to see an event for when an Entity (primarily a Player) is moving.  The main reason for this is I want to change the players' movement speed based on the block the are walking on/through.  I think it would be useful in many other applications as well.

I tried that, it doesn't work because you can move onto multiple blocks in less than a tick.  It doesn't update fast enough so the effect is jerky and inaccurate.

Ideally, I would like to do this in the OnEntityWalking method on the blocks, but I can't change the vanilla ones.  If there is a better way to accomplish what I want to do I am all ears.  I find it difficult to believe there is no way to do this, and This event may not be the best way.

So is there a better event for me to check the surface that a player is walking on?  There must be something, I can't imagine the game only knows if I have walked into a wall once every 1/20 of a sec.

You know what, I think it likely that this discussion is better placed in the Modder Support Thread.  I will start a thread there to try and solve my problem.