362599 STUDENT SHARING SOCIAL NETWORK

I'm looking to build a social network site targeting mostly student, a site similar to my space,facebook, with a video sharing portal like youtube,I would like it to be a original layout, not a clone or a copy, I would like the site to have all the features and capabilities of a social network site, where students can share just about everything, and talk about anything. -I want it to be very clean and stylish with an easy navigation. -I want a firm that can create the website and also help me to administrate it if needed. (I would need to be able to edit it myself (for major changes) but I also need someone to help me make changes on the website that requires high skills and that I cannot do myself, for example change of design, add of section. I will need guarantee for following things: 1. every page will load in less then 5 seconds 2. portal will have a capacity of holding 5 million users atleast with 1 million on single second easily. 3. definate ajax will be used so as to cut down the usage of bandwidth and other server consumption ratios 4. complete web 2.0 system. 5. multilanguage portal for 500 languages,as as planing to use different language 6. full life time free support and full source code with all copyrights. 7. Full site will work on caching technique and will be error free. 8. There will be proper use of ajax so that it dont affect SEo part and full SEO will be done. 9. security from spammers, hackers and mysql injectors 10. hosting and domain registeration is also available if needed. 11. Full admin flexibility for front end from the point of static pages to add/edit/delete/block of users, images, prices, membership levels, payment system, banners, advetisement and much more.