According to Cnet.com, Google is planning to penalize sites that overuse search-engine-optimization techniques.
“Google wants to “level the playing field” regarding “all those people doing, for lack of a better word, over optimization or overly SEO–versus those making great content and great sites”.
“We are trying to make GoogleBot smarter, make our relevance better, and we are also looking for those who abuse it, like too many keywords on a page, or exchange way too many links or go well beyond what you normally expect.”
“The changes will begin affecting search results “in the upcoming month or next few weeks”
This should make exact match domain even more valuable as Google continues to lessen the ability to game the system.