Researchers have already begun using Google to help with AI tasks. For instance, if you search Google for two words, you can get a sense of their relatedness by comparing the relative number of links returned (e.g., "cat and dog" vs. "cat and politics"
Wikipedia is an even greater potential source of data for AI techniques. With more than 1,000,000 articles now, I am sure the cross-links and statistical frequencies of words and phrases within Wikipedia could be put to startling effect.