Roadmap
Now, this is where it gets tricky - since it is still hard to predict what kind of features F4 will allow and what this awesome community will provide in terms of resources. But here's a rough outline - in no particular order.

Finished - Implemented - Work in Progress - ToDo - Distant Future

Basic enslavement (90%)
Functions (100%)
Implementation (lore-friendly game-play) (100%)
Equipment (5%)

Advanced enslavement (40%)
Perks (75%)
Slave Stats (100%)
Slave AI > Mark I < (60%)
Escape Engine (75%)
Restraint System (Equipment Registration & Usage) (10%)
Training for different roles
.swf Interface instead of ugly text box for showing slave stats
Furniture
Bondage

Economy (60%)
Functions (Buy, Sell & Store) (95%)
Traders
Caravans (Functions) (0%)
Workforce for Settlements (Pending further investigation)