Air China has announced that it will start offering wifi on its international flights starting tomorrow. Not for free, but USD 26.95 is not too bad if you can work for a couple of hours while flying to Europe, Australia or the US. KLM is still not offering it, the only thing they currently offer is sending emails and SMS through your personal video screen (for a few dollars per mail). Not being able to offer wifi soon might cost them potential business customers.
Several airlines flying from Shanghai to Europe are offering it now (among others Lufthansa and SAS), although I have to admit that I often hear stories that it does not work flawlessly. Furthermore it is annoying to hear your co-passengers constantly call their friends or family for free through Skype. Airlines need to find a solution for this soon before it gets out of hand.