Firstly, on parties, I'm used to grouping in WoW, LotRO etc., but with the zoning in GW things seem a lot different. For example, I accepted an invite from someone when looking for a gate opener in Pre-Searing Ascalon and ended up getting zoned two or three times, ending up in the French-speaking Ascalon zone!
Obviously you can be ported around according to the location of other party members, but how does this work across zones and map locations? Is it based on the position of the leader or something? Also, when I finally found someone to open the gate, they logged out after the job and stayed in the party as disconnected. I noticed that entering Ascalon again, they automatically disappeared.
I guess I'm asking for a basic rundown of the party mechanics as I can't seem to find a good description anywhere, other than how to add members to your group.
Secondly, is there a quick way to loot dropped items, i.e. a 'loot all' key, or do all items have to be picked up individually with the interact key/double-click?
Lastly, is there any way to bind mouse-look to a mouse key, so that you can move with cursor keys while looking around with the mouse, or can you only look while moving using a bound keyboard shortcut?
I'm liking the game a lot so far, but there are quite a few subtle differences to get used to it seems

Thanks in advance for any help!