yah I wasn't able to when I signed up so I was wondering if there has been any other word on how to do it yet, and as for me calling them mean I was being dramatic =p
uh basically use the exact same email and password as your gw1 account...and it should automatically link them
i think when you went to register.guildwars2.com to register your game code, it should have asked "Do you already have a Guild Wars 1 account?" If you hit yes, you had to login with it, and then apply the gw2 serial code....if not it made you make a new account....
if you did the latter, you might be screwed...or you need to contact NCsoft support immediately
"So hoping the final release of GW2 will improve these textures for the grass." - Xeeh Bitz, Guild Wars 2