Brian Benzinger at Solution Watch just wrote a very detailed and informative review on Diigo http://www.solutionwatch.com/303/diigo-social-bookmarking-and-annotation/
He nicely captured all the salient features of Diigo; hence, his review got trackbacks from various sources. Thank you, Brian, for the time you spent testing everything out and writing a great review about us.
I’m quite impressed — it’s New Year and Brian is still working hard! With his thoroughness in his product review, I’m sure to go read his other reviews 🙂