Now the search deal between Microsoft and Yahoo has been signed, the fallout begins.
In a conference call that also featured Yahoo head Carol Bartz, Microsoft chief executive Steve Ballmer warned that Google is likely to try and block the partnership as the deal is scrutinized by lawmakers. He said:
"We suspect we will face opposition from the competitor [Google]. The case of us coming together will provide more competition, not less. [However] we expect our competitor to be aggressive."









