Last night a new preprint from CDF appeared at the arXiv, discussing a signal observed in their data, at about 3 sigma significance, that could in principle correspond to a new particle not seen or predicted before. This morning’s New York Times has an article about this here. The Times does a pretty good job of getting quotes from relevant experts and explaining the situation, which is basically “if it’s real that’s very exciting, but it probably isn’t”.
I went to check Tommaso Dorigo’s blog only to find that he had a short posting up explaining that a more detailed one was embargoed until the public talk this afternoon at Fermilab (live stream at 1600 CDT here). This seemed rather odd since the Times had clearly been given the story a few days ago, embargoed only until last midnight. He now has a full posting up, and you should go there for a detailed and authoritative look at what this all means (most likely not much, modeling the huge background you have to subtract is hard).
Update: Took about 21 minutes from the time of release of this data to submission of a paper explaining it.