This is neither Nintendo not hackers... This is just someone who bought this domain name as a joke. You don't need to hack when you own the domain...
http://www.checkdomain.com/cgi-bin/checkdomain.pl?domain=pspgo.co.uk
Currently Playing: Shin Megami Tensei: Devil Survivor Overclocked, Professor Layton and the Curious Village
Anticipating: Xenoblade, The Last Story, Mario Kart 7, Rayman Origins, Zelda SS, Crush3D, Tales of the Abyss 3DS, MGS:Snake Eater 3DS, RE:Revelations, Time Travellers, Professor Layton vs. Ace Attorney, Luigi's Mansion 2, MH TriG, DQ Monsters, Heroes of Ruin