Here are some pictures I've taken @ Chennai airport. The new terminal/expantion works are pretty fast it seems and I was told that it'll be ready in 2012.
Also the Chennai Metro team is working to connect "tirusulam" suburb station with the Airport using underground walkway. I'd think it as a great idea and if they can add travelators that'd be perfect.
Hopefully they won't start charging the "user fee" like in Hyderabad or Newdelhi.