The system to be introduced on Cathay and Singapore is $10 per connection. So sign on when you get on and log off when you get off.
Their system only allows for batched E Mail. You can create then send but the plane only contacts the satelite every 15 minutes to upload and download. Pretty slick. Being that it's not online, the web browsing is limited to specific sites that are cahed on th eplane then refreshed every 15 minutes.
They are moving to a real time system but it's not ready for prime time yet.