With the very long title of: "New Research by The Kelsey Group and ConStat Indicates 70% of U.S. Households Now Use the Internet When Shopping Locally for Products and Services"

“Most of the Internet’s growth for shopping research can be attributed to large search engines such as Google, Yahoo! and Ask Jeeves, the usage of which increased significantly, from 47 percent in 2003 to 55 percent in 2005,” said Tim Trickett, vice president of business development at ConStat. “Further, the research shows that the increase in usage of the major search engines has been powered by broadband users exclusively"

Most of the rest of the release is plugging their upcoming conference "Drilling down on Local". I have covered the last two of these conferences and they are full of very good information.