Google Research: From Words to Concepts and Back (googleresearch.blogspot.co.uk)

I am grabbing the data accompanying the blog post (http://www-nlp.stanford.edu/pubs/crosswikis-data.tar.bz2/) right now. Looks to be a great resource for text mining applications for training data, labeling text by concept, etc.

It will be even better if Google can provide search queries associated with the Wikipedia entities.