Yup. Neodymium magnets are VERY strong. My 8th grade Physical science teacher had two small cubes and let us look at it. He even challenged us to split them, which was pretty hard and took a while for most of us.
They're used in a lot of things. Apple's iPod earbuds have Neodymium magnets in them, although they're in very small amounts, it's usually used in the making of the diaphragm or cones of speakers/headphones.