Social Media and Organization Facebook and HTC have joined hands and now launched Facebook HTC First Mobile.
You can have a facebook app installed on this mobile. Nice feature of this mobile is that if you sent an SMS to your friend, and if he/she is in your facebook friend list, he/she will receive it on facebook also.
Fore more details and specifications visit http://www.indiatimes.com/technology/mobile/facebook-htc-first-features-and-specifications-70240-2.html
Price in is US around $99. Hope it comes to India Soon.