codexsinaiticus.org
http://en.wikipedia.org/wiki/Codex_Sinaiticus#Discovery http://www.codexsinaiticus.org/en/codex/history.aspx
The "news" is that the text is now available online, whereas previously it was only available in print.
Details (if you're interested):
This story is 99% hype.
First, there are several major ancient New Testament manuscripts (Sinaiticus, Vaticanus, Majority Text, and tons of fragments). We have fragments from the second and third centuries, and entire versions from the fourth century (including Codex Sinaiticus). This isn't unusual; most of our manuscripts for other ancient documents (Plato, Aristotle, Virgil, etc.) come from many centuries after they were actually written.
Second, these manuscripts often disagree on wording, but they rarely disagree on content. Definitely not "markedly different". They were orally dictated to scribes, not reprinted by a printing press, which is how many of the differences were introduced.
Third, the "no resurrection" business is false. One of the four gospels - Mark - ends with some of Jesus' followers finding an empty tomb, and an angel saying that Jesus had rose from the dead. End of text. It doesn't actually follow Jesus around post-resurrection. But that's different than not including a resurrection, and it's really, really old news.