Recently Orkut had added support to applications like other social networks. One of the applications in Orkut is the SMS Me. This application allows you to send unlimited free SMS to any mobile phone in India and all you need is to verify your mobile number. Your mobile number will be displayed in the SMS. You can access the application from here or you can search for SMS Me application.
Add the application to your profile and start sending SMS. Another feature of this application is that you can SMS your Orkut friends, but for this your friends should also be using this application.
Via [Digital IT Blog] Thanks Atul for the Tip.