It’s too late to become a participant in TREC 2010 but everyone interested in building topic maps should be aware of this conference.
The seven tracks for this year are blog, chemical IR, entity, legal, relevance feedback, “session,” and web.
Prior TREC conferences are online, along with a host of other materials, at the Text REtrieval Conference (TREC) site.
The 2011 cycle isn’t that far away so consider being a participant next year.