
Originally Posted by
solracht
No game in the market allows temporary data transfer between data centers, as far as I know.
WOW's dungeon finder does not work cross region, and you can't move your character to servers in a different region at all.
GW2 does it a little better: it allows traditional server transfers between data centers, but guesting (temporary character transfers) does not work cross region, and their excuse was the different datacenters.
I wouldn't call it impossible but this game will not be the one to overcome this technological challenge.