Losing some luv for the MacBook Air: user can't replace battery
By way of Engadget, the bad news for potential MBA buyers is that the battery is sealed within the case. There's no idea yet how much this will cost to have a shop replace it when it dies.
As they're saying on Engadget, it doesn't bode well for the road person who might need to replace an old battery in a pinch. I guess that's when you have to rely on your iPhone, which also has a non-removable battery.