New teaser-trailer released
What is (behind the pre-rendered eye-candy) in the trailer is the announcement of a release date in "Fall 2010".
The accompanying press-release also lists that the game will be available on... (cont. p.94)
After the cancellation of Obsidian's Aliens
RPG, Josh Sawyer was appointed lead designer on Fallout: New Vegas
; recent interviews, a-twitterings, etc. from Avellone Trismegistos
indicate he is also working on the project to some degree.