UPDATES TOWARD THE BOTTOM
I noticed this a few days ago, but due to sporadic internet access forgot to post about it until Ausir reminded me. There appears to be an event related to Fallout: New Vegas taking place in Las Vegas right now. Whether this is just a chance for Bethesda and Obsidian to get together or a new press event is unknown at this time.
What I have been able to find out is that Bethesda's Pete Hines and Jason Bergman are in attendance, as well as Obsidian's Josh Sawyer and Feargus Urquhart. More people may be there, but details are sketchy right now.
More updates as they come.
UPDATE: I can now confirm that there IS a Fallout: New Vegas press event taking place in Las Vegas right now (possibly already finished). Guys from The Escapist are there, and have been allowed to tweet as such. Escapist editor-in-chief Russ Pitts tweets:
I've been informed that I can now safely tweet that I am in Las Vegas at the Bethesda press event.
In addition, he posted the following:
Stay tuned to DAC for continuing updates.