Can I get your opinion of my startup ideas?

I took a quick look - you do have some interesting ideas in there.

I was wondering though, how would you go about implementing this:

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Webapp: Search engine for search engines

You enter your search and it directs it through the most relevant search engine.

chinese restaurant -> Yelp

ruby tutorials -> delicious

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What I mean is, with so many possible keywords/phrases, how would you go about determining a relevant destination corresponding to each different query?

We've been working on something pretty close to this for quite some time; have had some breakthroughs; but it's been an uphill battle, to say the least. :-)