The track website has information on the 2009 track and what is planned for 2010. One change they are seeking discussion about is a new semantic entity search subtask:
We propose a semantic entity search subtask for 2010: return URIs of related entities, instead of their homepages. We are planning to enrich topics with URIs of the input entities. URIs need to come from a predefined set of semantic data sources (which will include DBPedia and Freebase, at least).The plan is to use the full category A set of ClueWeb09, which has 500 M English web pages instead of the smaller B subset which doesn't contain many entity homepages.