You can probably add Microsoft to the list of companies infected by a compromised web-browser plug-in of Oracle's Java for Macs. So far that list includes Facebook and Apple, but could also include Twitter. Officially, Microsoft was light on details and only said, "we also recently experienced a similar security intrusion." To reiterate, Facebook and Apple employees' computers were compromised after visiting a software developer website infected with malware.
Unfortunately Microsoft isn't sharing a lot of information and even Reuters came up short on providing any extra news. For now, the only information is that a few computers were affected, that some were Macs and that no customer data was accessed.
The announcement was made in a TechNet blog post
Consistent with our security response practices, we chose not to make a statement during the initial information gathering process. During our investigation, we found a small number of computers, including some in our Mac business unit, that were infected by malicious software using techniques similar to those documented by other organizations. We have no evidence of customer data being affected and our investigation is ongoing.
Trustworthy Computing Security
Maybe we should write up an article about how Google employees' MacBooks got infected with the same malware, and have it ready for whenever they decide to make the same announcement.