bulk sms services website

i need to build a website that will provide bulk sms services. an example of what i want you can find at: [login to view URL] we can use any sms gateway that you prefer (if the prices are good). the service will run for Greek costumers. (Vodafone, Wind, Cosmote). basic functions: send sms (type all numbers) create unlimited number of groups of contacts (first name, last name, telephone number) reports of delievery Personalized SMS (firstname or last name at the start of a message) We will accept payments from paypal & eurobank greece (proxypay3)