It seems there's a guy in Sweden who was tired of writing on white paper with darker-than-white lines on it, so he decided the way forward would be pale grey paper with white lines. So Whitelines happened.
What a bizarre idea. Apparently it also means the lines disappear in the photocopier.
Still, I ordered a couple of pads (although I could only find one UK stockist, and they got a bit silly on the postage) because I'm a sucker for a cute gimmick. They came today, and in person the whole idea seems a bit cooler than it sounds. First impressions are that the white-on-pale-grey is actually oddly relaxing to work on.
When I get round to it, I'll post a pic or scan or something.