Diablo Game Questions Trying to play D2 with my LD Girlfriend, US West to US East

Hey there, so I've recently moved back to California from the East Coast and i'm trying to get my girlfriend into Diablo (she's giving it a shot right now haha). Just curious, is there much of a connection difference between regions?

Also, i've been looking for a second set of classic and LOD cd keys, she's using mine right now and i've been trying to see if anyone isn't using their's anymore? Can send pics to prove am real person haha.