google customize.bmpGoogle is offering bloggers and other Web site owners a way to produce a customized search engine for their own needs.

This could hurt start-ups like Rollyo and Eurekster, which have been trying to make a business out of this.

Google’s incentive to the site owner is a cut in the revenue from ads that it offers with the program (details are here). Eurekster offers a similar cut.

From Google’s statement:

When we say we’re letting people build a custom search engine, we mean the whole thing: choosing which pages they want to include in their index, how the content should be prioritized, whether others can contribute to the index, and what the search results page will look like. Custom Search Engines are monetized through the Google AdSense program so they can even generate revenue with it. Universities, non-profits and government organizations can choose not to run ads on their search results if they’d rather not.

You can already see a few Custom Search Engines in action. Intuit’s JumpUp.com site, which provides information and resources to small businesses, is combining a Custom Search Engine with its years of experience in small business to provide the most useful resources on the Web to its users. Or take RealClimate.org, a site that offers expert opinion on the science of climate change. They have created a searchable subset of the Web to provide reliable scientific information to its visitors.

Here’s how a Custom Search Engine works: organizations or individuals simply go to www.google.com/coop/cse and select the websites or pages they’d like to include in their search index. Users can choose to restrict their search results to include only those pages and sites, or they can give those pages and sites higher priority and ranking within the larger Google index when people search their site. Users can then customize the look, feel and functionality of their search engine.