Servers
There are currently five servers for PWI. All servers are named after cities in the game. The current status of the servers (online or offline) can be seen on the main PWI page.
Server List
Lost City - This is a West Coast PvP (Player versus Player) server.
Heaven's Tear - This is a West Coast PvE (Player versus Environment) server.
Sanctuary - This is a West Coast PvE server.
Harshlands - This is an East Coast PvP server.
Dreamweaver - This is an East Coast PvE server.
Raging Tide - This is an East Coast PvE server.
The East Coast servers are newer than the West Coast servers, so there are fewer high level players on the East Coast servers. The Raging Tide server is the newest of all of the servers (opened on Dec. 17, 2009).
On PvP servers, once you reach level 30 then anyone can attack your character and you can attack anyone else.
On PvE servers, players normally can only attack each other if they go into PK (Player Killing) mode, which lasts for 10 hours minimum. (There are still a few areas, such as some rooms in the Cube of Fate, in which PK is always enabled.)
Selecting a Server
When choosing a server you should probably base it on the one with the lowest ping time (you should see this when selecting the server) and whether it is PvE or PvP, depending on which you prefer.