PVP Concepts

Boosthungry

First off.  Please don't kill me for starting this thread.

I have looked around a few diffrent forums and still can not find any information on the rules of PvP or the diffrences between PVP and PVP-RP servers.   From what I gather the PVP servers will obviously have open world pvp in all but a few zones. 

Is this going to be FFA or more of a faction vs faction deal?  I have not heard much about factions, just races, so it sounds more like FFA? 

Talk of eventually setting up alliances between guildes, are these just rumurs or does this concept come from a reliable source?  would it be offical alliances with the inability to hurt them or more of a way of seeing if they are friendly to you?

Is there going to be a lvl range for PVP or is it going to be lvl 50's attacking lvl 20's?  I play EQ2 because I love the way the PVP is set up, it's faction vs faction with a lvl range for pvp. 

Are the seige fights going to be faught in the acctual world or an instance? if in an instance how much of the acctual city can we see just wondering around the outer zone?

Diffrences between PVP and PVP-RP rules?

I'm pretty sure much of this hasn't been released yet so don't flame me for not doing my research.