I made a mention of this in ER yesterday but it looks like it's gaining some steam. We know from the past that the courts were able to slow MS down a bit but in the end MS will prolly just get a slap on the hand. But getting a new OS delayed is pretty interesting stuff:

privacy concerns regarding Windows XP. During a Tuesday press conference, Sen. Charles Schumer, a New York Democrat and member of the Senate Judiciary Committee, asked federal and state trustbusters to consider taking action that would delay Windows XP's release. He also called on Judiciary Committee Chairman Sen. Patrick Leahy, D-Vt., to hold hearings on the matter. [...] Also Tuesday, software maker InterTrust amended an existing lawsuit against Microsoft, asking for an injunction against Windows XP.  [...] state attorneys general said they, too, would consider an injunction to delay Windows XP's launch

That's a lot of people.