WebProNews

Using Intent based information may open a different Pandora's box not thought about before. Let me explain. If I searching for sports tickets or sports memorabilia a future intent based search may yield liquor ads or gambling ads or worse even. I have seen their site and was duly impressedThat is backdoor gleaning of information on the user  will actually insult a sports fan who does not like liquor or gambling. A middle road approach may work here using results both intent based and content based with a mixture of other variables. In this secnario the user will never really know if the ads are content based or intent based or not based at all.
There is a company that seems to be aggregating results to maximize user confidence and minimize bad results. They call themselves a
search machine.

I have seen their site and was duly impressed