It's been a busy couple of days in the never-ending soap opera that is the Sony BMG rootkit saga. Here are some of the latest developments:

• Microsoft says it's "concerned" about the issue, saying security is the company's "top priority."
• The first trojan to take advantage of the Sony rootkit has reportedly been found; a new version of the Breblibot Trojan specifically tied to the Sony software is in the wild, though no specific infections have been cited.
• At least one more lawsuit has been filed against Sony, in addition to the one in Italy that was filed earlier this week. The new suit, filed in California, alleges that Sony has violated at least three state laws, including one that specifically prohibits spyware.
• And how is Sony dealing with all of this? The company basically sees the problem as a non-issue: "Most people don't even know what a rootkit is, so why should they care about it?" Thomas Hesse, the president of Sony BMG's global digital business division, told NPR. In the meantime, however, the company has dropped the DRM in question, though it will continue to use copy protection on future CD releases.