bulk sms site along with gateway

hi ,i m looking for a bulk sms solution where a person sign up or log in to open his account and can send sms to all over india(maybe also to the whole world)through sms gateway through my website. i need to know what is the best cost involved (sms and setup) for reference [login to view URL] [login to view URL] items required [login to view URL] info [login to view URL] info [login to view URL] of mobile nos n saving them [login to view URL] [login to view URL] gateway integration with google checkout [login to view URL] creation( like sms send by anand instead of the phone no) if i find a proper source i will surely add upon building a portal (adding to the current site with news,updates,shopping cart,travel,etc)later. right now my first criteria is to start a bulk sms site as soon as possible pls inform about it with some details. thanks anand