Update:
So I believe I've finished digging out the grid. It basically consists of Arrakeen, which at first will be the main focus of RP, about five locations on or along the Shield Walls (Old Gate, Plastic Basin, Cave of Riches, Observatory Mountain and Imperial Basin), a Deep Desert room, Carthag (which will just be a fortress settlement right now, not the large city it is in the books because at this point House Harkonnen hasn't built it up that way) and Sietch Tabr.
There will be more in the future such as Arsunt and Qina (for a couple other of the Great Houses to have as "capitals") as well as Sietch Jacurutu. But I think that's a good place to stop for now.
Next I'll be finishing off the @descing and going through NEWS files and such.
I'll need to get @Thenomain in at some point to install the CoD code so I can start reworking it for Dune universe setting.
Anywho, just an FYI for those following progress