Davide, Planit 3d's site is being redone, there may be some issues with how it works while they are working on it, but as far as I know it's still there and there are no plans to end it only make it better. I know Fitzy and Slinger are working hard on a big new look for it as well as a lot of good changes for it so don't worry I'm sure all will be fine soon with the links