Personalization - Music
Agent Arts and other music recommendation/personalization systems are an interesting model for video personalization systems. They utilize a specific ontology, defined semantics, manually annotated media assets, and personal preference, experience and demographics.
Also look at ChoiceStream and Digital MC (now Mutique)
Agent Arts recently announced their "Music EcoSystem," a set of smart tools to provide businesses with advanced meta-data and analytical marketing information based on P2P file sharing data.
I'd be interested to know Agent Arts' licensing model and pricing.