Here is my quick view on how I see these guys.
Google – Massive, arrogant, academic, cash rich, well positioned for future, do great products with lots of simplicity.
Microsoft – struggling with change, locked into Windows, too risk averse, should learn more from IBM at being big but profitable.
News – money money money, not innovating and don’t ‘get it’ but happy to buy apps with eyeballs. Open Social will be interesting.
Yahoo – too mixed up, no consistency, no solid direction, but trying pretty hard.
I’d be a lot more interested if Apple bought Yahoo. I think they’d clean out the crap, focus on the real wow stuff and present a more compelling proposition. If News bought Yahoo it would get uglier and messier. YahooVegas!