Yellow Pages not being crawled by Google?

Matt Cutts, Google's Senior Engineer explained in his video blog yesterday, why some pages appear in the search results even though you may not want them to. According to Matt Cutts explanation, Yellow Pages seems to be blocking Google from a lot of their pages.

Matt Cutts also released a video today explaining why comment spam is such a bad idea and why they took measures in 2005 to stop it having any positive effect in your rankings.