Likely Regulatory Questions On Microsoft-Yahoo

As the MSFT-YHOO deals gets near, a set of regulatory questions that are likely to come as the deal gets federal scrutiny (especially in light of how GOOG-YHOO deal that never happened because of the regulatory issues):
— How will MSFT-YHOO share search/user info?
— How will the two share this info with their partners?
— How will the ad targeting work for users and on the backend?
— What impact does this have on smaller players?
— How does it affect competition in the space, on the following parameters: lower prices, better service and greater innovation?
— Will this materially reduce competitive rivalry between the two companies?
— What effect would this have, if any, on MSFT’s desktop OS and related services share, especially as the industry moves towards cloud services?
Any others?