How to find Experts with the Social web?
- Wikis: Wikipedia and Knol: authors are often well-known experts
- Blogs: use specialized engine like Google Blog Search
- Presentations: use the search form on slideshare
- Twitter: TOPSY returns results showing you who has been speaking about your keyword the most, on Twitter
- Linked-In: use the Advanced search to type keywords or browse topics groups
- Experts Directories (Q&A service maintained by volunteers)
- Whos Talkin searches across many different sites including blogs, social networking sites, news sources, social bookmarking sites, and video and image sites
My opinion: these free tools, whatever their quality, cannot be compared with an extensive search on paid databases (literature, patents, etc.) to identifiy opinion leaders, etc.