Dutch radio channel Radio 538's logo has been animated. In a so-called Ident the two Radio 538 balls bounce and then stop. Brands more and more often have their logos animated. To draw extra attention, and especially to add personality. Traditional brands are used to using a fixed logo, and don't 'dare' to touch it. Media brands know they can add associations to the brand when using animations. This field will keep developing over the years to come. In the end all logos will animate, and react at interaction. Only in very specific situations it will still be fixed. On a cardboard box for example, or at an invoice. It then will be a derivative of the animated logo, like the black-and-white logo often is a derivative of the full-color one.
Update: 2019: Because Flash is no longer supported in modern browsers this animation is no longer visible.