Hi Eric, well it is a pretty big area of work, especially with the UI design so it is pretty hard to nail down a specific ETA for it, sorry!

I will be starting in to work on it just after this next beta is wrapped up.

The layer stuff will probably be kind of a work in progress for the next couple of months before it is all really wrapped up.

It is unfortunately a hard thing to guess at exactly how much time it will take.

- Michael