Wow, the train I just caught to move back from Paris to Luxembourg... is offering to use free WIFI. I am actually blogging this post at 312Km/h from my laptop...
The internet speed is really good, I can even watch videos on dailymotion. This action is only a test but I cannot wait for the regular WIFI service to be launched... Below they even offer a live map to know where you TGV train is...
They even offer videos & music for free (you can dowload VLC player in order to watch them)
