Rollyo.com allows you to create a customized search engine using web sites you specify. I have created a Rollyo search engine using only restaurant industry web sites (click here). To see the usefulness of Rollyo, I just recently did a search for "outdoor dining" using google and the customized rollyo search engine.
For a restaurant owner, the Rollyo search results link to much more relevant information which saves time and lets you spend more time reading then looking through search results. You can focus your sources on vendors, specific regions, or select magazines, as well as mix and match.
Go to Rollyo.com to create your own search engine and use your own sources.