Build a search-based-app using an API from a major search engine: google, bing, yahoo - who offers search API?

I need to provide search functionality as the cornerstone of my app (basically I think I can make a better interface than whats is offered by Google, bing, yahoo - bold claim I know). Therefore I will not build an entire search engine from scratch, I will rather use an API provider by a major search engine and simply modify the interface that present the results to my visitors. I am a Google fanboi and I initially tried to use Google Search AJAX API. However, I was very disappointed since I can barely change anything at all.

Specifically;

I need an API that will let me pull programmatically the results from a major search engine and let me output them with the style and goodies that I want.

I am not looking to alter the order in which the search results are presented to the user by inserting crap in between the good results (this is against my philosophy). But I would like to wrap massive 开发者_开发技巧php/javascript around each search results so that I can completely control how each result is graphically rendered.

I heard of the BING API 2.0, would that be more flexible than Google AJAX API? Could anyone provide output if any of the current search providers are offering API for this purpose right now?

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After careful investigation it appears to me that the Bing 2.0 API is the most flexible and robust search API currently on the market.

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The Bing API does require you to put their ads next to the results. You can place your own ads with the Yahoo API. The Yahoo API uses the same search technology (same results) and can be used starting from $0,40 per 1000 queries. The lowest, bulk price of the Google API is $4,00 per 1000 queries. Google's relevance is easily ten times higher for the somewhat more advanced queries.

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And also Bing version 2 search API is free! Whereas, Yahoo BOSS V2 has pricing and so Google does custom search API.