Facebook has enabled chat for the India Network.
I was only a matter of time, before this happened.
First thought: Gtalk has competition. If you spend more than a few minutes on facebook, then Facebook Chat has the potential to make you stay for even longer. Orkut had it, but it somehow always seemed kind of wishy washy...
Think further and there is no reason why facebook can't have a robust mail app. It will be a logical progression (like gtalk was a logical progression for google) of features. Though, you can already send mails from facebook to a regular email address, facebook needs to create seamless two way mail a usable option.
More time on an app that does social networks and chat and mail... yes please...
(Technically, iTimes.com already has mail built into it, but being the first is not necessarily by default the best option.)