Mashups

We are discussing the Web 2.0 creation of "mashups" which utilize information from different web sources for some (not always useful) purpose. I found one called Liveplasma which takes information from Amazon to create visual maps of how closely artists are related to each other and what they have done. You can then click on something to buy it on Amazon. I doubt I'd use anything like this to determine buying choices but the bubble maps are cool looking.