MailChimp integration (using PHP)

Please DO NOT BID IF YOU HAVE NOT WORKED WITH PHP AND MAILCHIMP I have a Daily Deal Aggregator that is not completely live yet, similar to feedy, old yipit and old onespout. It's PHP and MySQL. I need the following: MailChimp: I need to integrate MailChimp to send emails daily using PHP. Now there is around 2000 emails and it sends emails using native mail. The goal is to be able to send tens of thousands (50,000+) of emails "every day" using MailChimp. We will use reports from MailChimp to analyse everything: Emails opened, bounces, clicked, etc... I expect you to tell me what is needed and recommended from MailChimp.