Angela Gunn at BetaNews gives an explanation and review of Surf Canyon:
“The results are cleanly presented, and the recent addition of categories within results helps users to understand what the plug-in thinks you’re seeking… results were intriguingly focused, and in a research situation SurfCanyon excels at winnowing the less-than-helpful.”
Update (11/3/08) – Tim Conneally at BetaNews also mentions Surf Canyon in an article about semantic search plug-in SemantiFind.