Same issue here.
Currently; tried logging in 10 times. Firewall note (always the same IP too):
GW2.EXE 64.25.47.110: 6112 *Allow Outbound TCP to 6112 for GW2.EXE 287Bytes sent 0Bytes Received
Tried a backup of the GW2.exe… no joy.
NCSoft’s end, I’d say. No doubt it’ll be fixed shortly.