Current phase is gold purchase, character creation, and earning of dividends in stone. This is all done strictly through forum threads.

Next phase (schedule for a few days from now) will using stone to build (as allowed by the game rules) with some shared documents that show a map of the city

After that (scheduled for next month) will proceed to the first interactive phase where you will be able to visit a web site where you can "walk" around the city and interact with other characters.