[Source] The first level 80 character in Guild Wars 2 was confirmed a couple of hours ago, with the honor belonging to a player named Surfeuze, member of French guild War Legend. He
Update 1: According to a member of War Legend, Surfeuze did play the game normally at times as well, hence his 80 levels were not solely from crafting. The first 60 levels were from normal gameplay, while the final 20 levels were from crafting.
Update 2: ArenaNet claims there is something fishy going on and they are fixing it.
Update 3: Official statement from War Legend!
Update 4: ArenaNet confirms achievement is legit, no exploiting of sorts was done!
However, it is important to note that his stats and level will still be changed according to the map he is in, hence he will not be dominating the low level maps. Also, reputation points from participating in events will be needed to purchase certain items and missing many achievements. Still, this is a feat to behold.