There’s a lot more out there on implementing collaborative filtering and personalization than on efficient web of trusts.
- Adaptive Resonance Theory clearinghouse – first read about ART-1 in DDJ a few months ago
- Personlization [PPT] – an explanation of ART-1 w/ example
- Item-based Collaborative Filtering Recommendation Algorithms [PDF]
- Improvements to Collaborative Filtering Algorithms
- Principia Cybernetica: Collaborative Filtering – PC is a great site
- Resources on Collaborative Filtering
- RDFWeb Research Notebook – I’ve linked to this before, but hey, it’s still a good list of Web of Trust resources.
- Trust Networks on the Semantic Web [PDF] – one of the papers on the Semantic Web Research Group, has a useful bibliography