We've recently finished the SDK part of the roadmap and provided documentation on them.

Unfortunately a lot of time and resources has been spent dealing with the same problems Lisk has encountered with public delegates and forging, therefore the roadmap has been pushed back quite considerably.

Progress has been made alongside trying to solve the delegate problem and despite this we were able to get the SDK's complete and can now advance on other parts of the roadmap.

A technical run down on where we are, the next steps and how we intend to deal with the delegate issues will be released in the next update from Justin (our lead developer) early next week.