Dark World and World of Kulan have always been linked since I linked the Kingdom of Ahamudia to Maran. Therefore, Dark World will have its own subsection here, which I'll hopefully update from time to time. Dark World is a True20 campaign world.
The World of Maran will have its own section on the new Kulan wiki. It's page will be a general overview, to start. Note that Dark World is a Castles and Crusades campaign world; however, it could just as easily end up being used with AD&D 2E.