Y!Q is Yahoo's beta contextual search tool. This means it gives you search results based on the context of what you are looking at. For example, at the bottom of this blog post, you can get a search result in a little popup. The results should be related to the text I've typed below.
So let's see what Y!Q has to say about click fraud. As I opine below, click fraud could be a really big problem for Google. If click spam has a year like email spam had back in 2003, we could see the percentage of fraudulent clicks go from 10-20% today to perhaps 50%+. That would cause people's perceptions of the PPC marketplace to change and could impact the value of Google stock.
But Google can adjust if they would "float" their minimum bids - the way that the government floats the value of currency. They also need to be more forthcoming about how much click spam is actually happening to them. So does Yahoo and Overture.
Now, back to Y!Q - could contextual search change the model for search advertising? Try it out below, and let's see what happens...