Well I am not sure if it is the worst ever..... But it has gotta be pretty high up there on the list. It is the amazing iPhone Holster, which for the modest price of $35USD you can.... not actually have one because I can't imagine this guy getting enough backers! Details here

So ignoring his failure if you haven't seen the site Kick Starter before I would suggest you all check it out. It is a place where people with a creative idea can advertise their concepts in the hope of getting enough funding. My favourite on there at the moment is this neat sleep mask that wakes you up by imitating the Sun. Brilliant. Check it out here