So the strike is confirmed Oct 4th which is tomorrow. What a pain!
There are lots of cancelled trains on the RER line B which goes to CDG airport, so air travellers may find a bit tricky to get to/from the airport.
Lots of Metro trains and buses are cancelled as well.
Updated information is available here:
http://www.ratp.info/orienter/trafic.php
It's in French only, couldn't find a similar page in English.