I wanted to respond to the line that Microsoft won't care about the petition. I agree, however, it isn't Microsoft or Yahoo who will be approving this merger. Even if Yahoo accepts Microsoft's offer, it makes no difference. This merger is anti-competitive and Microsoft has already been found to be a monopolist in the desktop OS. They may have a monopoly in the Exchange Server area, or at least an extremely dominant position.
Unlike the board game, Monopoly is a bad thing. A monopoly is when a company is so successful and becomes so dominant, that the competition no longer has a chance. Think of it as capitalism out of control. It is the government's function to fix that and restore healthy competition.
Remember Esso (now Exxon) was broken up? AT&T was broken up, and all the baby bells were spun off. It is not hopeless. Here we aren't even talking about a breakup which is very difficult to oversee, we are talking about not permitting a merger, much simpler. Microsoft getting Zimbra would be extremely anti-competitive. I think the chances we will win are quite good. The only fear I have is do people understand what Exchange Server and Zimbra are? Since we are the experts, it is up to us to get the word out.
And Yahoo and Zimbra together are a stronger competitor to Exchange than Zimbra as a stand-alone company. So while it is possible the government can force Yahoo to spin off Zimbra before the merger is consummated, even that would be anti-competitive and would be a partial win for Microsoft. The Yahoo-Microsoft deal can not be allowed to go through.
We will win. Am I willing to sit back and trust this will go perfectly? No. That is why the time to make some noise is now!