According to the NYPost Microsoft has reopened talks to merge or acquire Yahoo! The estimated value of the transaction, if it went down, would be $50 Billion.
This merger/acquisition would put them at 27% of the internet search market with Google at 65%. Not to mention the amount of eyeballs they have combined.
NYPost says that if this happened the online advertising that Yahoo and Microsoft control would only be behind Google 13%.
This is a really big deal and I think it would be interesting if it happened, it would make Microsoft/Yahoo! the most dominant force on the internet.