The Wall Street Journal, which appears to be a conduit for the negotiations, has a story, "Microsoft, Yahoo Talks Intensify In Push to Reach a Friendly Deal," and another one, "Yahoo-Google Pact May Be Close." It doesn't seem that a Yahoo-Google mating on advertising would lead to a friendly Microsoft-Yahoo discussion this weekend. It's an interesting game of chicken, with many issues, such as regulatory approval, up in the air for any permutation of a deal with the triangle.
It's clear that Yahoo and Google are trying to check Microsoft by hooking up, but it would only be strategic for Yahoo if Microsoft ends up paying a higher price, meaning it has to motivate Steve Ballmer into coming up with more cash. More Details>>