MusicMap
MusicMap is a neat flash app that lets you explore artist similarity. MusicMap uses the 'similar artists data' from Amazon to form a graph of connected similar artists. In concept, it is identical to LivePlasma (formerly MusicPlasma), but I've always found the LivePlasma interface to be awkward and confusing and downright slow. MusicMaps is quite intuitive and really quite zippy. You can explore an artist similarity space quite easily. This biggest problem with this app is that you can't listen to any music. You may find that ColdPlay is similar to the White Stripes, but you can't listen to either. First seen on Information aesthetics: