I wish there was more to post about this game trailer, but all standard Internet detective tricks haven't turned up anything worthwhile. What you see is what we know.
Featured in the trailer is a bank robbery, high speed police chases, and the ambiguous release date of "Summer 2009". It's anyone's guess whether this is going to be another GTA-like game, some kind of racing game, or even a shooter.
Think you have an idea of what this game is? Come speculate in the thread on our forums or leave a comment.