I am working on a project to build a social networking web site from scratch using oracle database and an application server like Tomcat. Can any one with prior experience let me know what is the total cost I can expect to incur in execution of this project? Assumption is that this website will be able to support several million users.
What is the annual cost of oracle database?

Dear guys and girls, kindly let me know, what is the best social networking web site? I want to join any social networking site but I want to choose which one is best in use.

Thanking all of you in advance for your assistance in this matter.