That's a neat idea! Just a suggestion but have you thought about putting a Custom Search for google (not sure if bing does it) that way if people click the ads you'll get the money. I'd also perhaps mix the results onto one page, one after the other... Good idea!
Yeah, GREAT idea -- you would need access to the google api through their custom search engine and you would need to embed bing on the page without the use of iframes with more of an ajaxy feel regarding iframes -- it's a cool idea. Mashing many search engines into one would be the best of them all -- You should go ahead and try it out. PM sent
There have been a billion different framed multi-engine search engines over the years, dating back to before there was even a Google. At this point, it's almost clichéd.
It is a cool search engine then. I get results from google as well as bing at the same time. Those wanting to search both the search engines at once will love this tool.
The theory of it is really good in my opinion - people like myself sometimes want to search both and this allows us to do it easily! However, just on the aesthetics, my personal opinion is that it looks a little 'messy'. Perhaps the scroll down for bing would be better on the left?