Build User-Gen Digital Content Site & Mobile Site

We are a web company, looking for a web shop to help us build and launch our updated and expanded site, as well as be our go-to for maintenance and improvements. Please, no firms from India. U.S. and Canada preferred, but native English speaking staff is a requirement! We care mostly about what you've done, not what you can do. Show us examples of other clients and how you have completed these tasks for them. If you're not fit for this account, don't waste our time or your own. If you are, we'd love to get to know you! YOU NEED TO KNOW: - Object-Oriented PHP Programming - Javascript - Flash / Action Script - integration with javascript - MySQL and SQL - experience with MemCache - experience with XML - knowledge and previous experience on mobile websites - experience with Facebook & Twitter API integration ***We have a designer on staff to assist you with design direction HERE'S WHAT YOU NEED TO SHOW US: - previous experience working on big websites w/ high traffic - you know ways to optimize the site for exponential growth - have created web applications for websites that handle large traffics