Check out the announcements page section. You'll see just how much damage some of these bogus cures can cause. I've been waiting for this one to get on line in it's present form, and it's still partially under construction. I like this site, and not just because I'm a puzzle person. I love the sight design - it has excellent use of color and graphics.
Navigation is simple.
If you're into web site design, check it out for the look. If you're into puzzles, see some of the less famous puzzles Rubik created. There's also a screen saver to download. Lite faire, but worth a visit. You enter your URL, and get a diagnosis of your page covering load time, dead links, popularity, spelling, and design.