Is anyone now using Python 3 in production? Would you use it if you were starting over?

This was discussed briefly at Google I/O this week:

http://www.youtube.com/watch?v=KKQS8EDG1P4&feature=player_detailpage#t=2554s

key slide:

    Python 3: next generation
        Do this if completely new
    Python 2: current version
        Most books/tutorials still here
        Do this if have existing software
    Bottom line: either is fine