According to Twitter, it looks like there might be a Fallout: New Vegas event in Las Vegas itself in the coming days. It might be a closed event for the press, but who knows, maybe they'll make some public announcement there?
“flying to vegas tomorrow. whee.”— J.E. Sawyer, Twitter
“is off to Vegas for a few days”— Pete Hines, Twitter
“Off to Vegas for the rest of the week. Sadly my Luck skill is very, very low, so I generally don't gamble.”— Jason Bergman, Twitter
Luck is a stat, not a skill, Jason!
Update: Pete Hines has just posted another tweet:
“our Vegas event is off and running. So far, so good”— Pete Hines, Twitter