One of the good (potentially great) things about on-line reference sites is that it can put you in touch with those academics who share interests with you. This particulary true with CiteULike, which by design encourages co-operation, for example, it allows you to see who else shares a reference in your library.
The link belows is a tool which works out which users share the most articles in your CiteULike collection, and you can then cherry pick interesting articles from their collections.
I first found this on the shadow blog, who turned out to one of my neighbours!
The link is here:
Technorati Tags: citeulike – social networking – reference management
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It should be mentioned that Connotea has a built-in feature to identify related users:
Source: http://www.connotea.org/faq