Topic: 6) Technology
This was brought to my attention via the blog "A VC". Although words can describe it somewhat, you've got to try it. You can basically search by band, musician, or album and pull up a visual map of music that sounds similar and/or may match your tastes. Includes links to Amazon.com for purchasing. Given music is one of the huge topics on mainstream, personal blogs, I wouldn't be surprised if we start seeing this kind of music search engine and advertising technology applied to contextual marketing and widgets on the Internet.