A draft of the Croquet Road Map is now available here:
Go here: Croquet Road Map.
There are three critical items: Island Classes, Two Dimension Infrastructure, and Documentation. These are the essential elements of the next big Croquet release, which I will discuss a bit later.
The first item probably needs some elaboration. Island Classes are classes that are part of the replicated Island's definition. They can be edited like any other class, but only exist inside of a particular Island. The code can be reused only by copying the classes between Islands. This goes beyond a uni-class framework, turning Islands into complete encapsulated development environments. This may raise more questions than it answers, but it is a critical aspect of what we were after when we created Croquet - the ability to share even complex simulations between users in a protected space.