I just came across this listing at the Guitar Center site:
According to the listing Push for Ableton Live 9 will be available at February 10 next year (2013). I guess that pegs the release date for Live 9 at February 10 2013 as well?
At the same time Musicians Friend has Push listed with a release date of February 17:
UPDATE: As pointed out in the comments, Guitar Center is now reporting March 18, and Musicians Friend is at March 25…
UPDATE 2: Ableton has now officially announced March 5 as the release date for both Live 9 and Push via their website:
Are you getting Live9? What about Push? I know I’m getting both! :)