I was wandering how it will be handled if I as a player run into a DM controlled NPC, and we start to interact. Lets say that I through mutual roleplaying manage to raise my social rank in the society (or whatever).
Will there then somehow be a DM info. database regarding players who have gotten certain information through one DM so that other DM's will know this??

Social standing is handled by your faction ratings. These can be adjusted by the DMs and are visible to all, reactions are automatic.
Anything else will be handled by physical things the character has which may or may not be visible to them.
Are we going to keep a database of eveything that each of the 760+ players ever did? no.