Sora is n1, keep up

. The releases are scheduled to go up to 2.5, current one is 2.2. after 2.5 will be 3.0 - the RPG World update that you refer to. The releases are roughly every 6 weeks. RPG World will obviously take longer, since its an entire customisable game you can walk around in, fighting monsters and finding items, S/Nes Final Fantasy style.
Twilight Sora - just me n ZT who work on the RPG really. Unfortunately i cant reveal any more details about those features since they are still in the development stage. I have worked on them over the past few weeks for an idea for a seperate Inferno related project which never really got off the ground, and we decided to adopt and adapt some of the ideas for regular RPG Inferno, still working out a few specifics though.