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The answer to all your questions are "Yes". :)
Do many of the major modules and libraries support Python 3 yet?
Yes.
Is it gaining acceptance
Yes.
or are people mostly sticking with 2.x?
Yes.
Your question is a bit fuzzy, namely. If you are wondering if you should use Python 2 or Python 3, then the answer is "Use Python 2". There are many who uses Python 3, but they wouldn't ask the question. :-)
I'd expect that to change in 1-2 years, when the answer will be "well, it depends". And in around 3 years the answer will be "Are you using a library/framework that hasn't been ported?"