Riddle Sites

I'm not sure if these forums cover word-based riddles or 'internet' riddles where you use your knowledge of computing and the web to find the answers rather than all-round intelligence and logic, but does anyone know any sites that provide both? I've tried stuff like Notpr0n but found it tiresome and very illogical, are there any sites you can recommend that cater for both my basic needs? Many thanks, Charlie