I am using s2member on one of my large membership sites. I am currently using mailchimp, but the costs are getting ridiculous.
Do you know of anyone that could help me integrate with s2member via the API?
I've heard good things about http://www.odesk.com/
You may consider taking a shot at it.
@jonbennett I have 2 devs I've used to integrate Sendy into a 3rd party payment processor and into a custom coded popup lightbox email opt-in form. I just sanctioned one of them on a new Bootstrap login/protected page/PayPal & Stripe/Sendy integration for two membership sites I'm developing. I'm guessing he would be your man. If you send me a PM/DM I can get you his info. He's the man when it comes to this stuff. Other than Ben, of course. ;-)
@vincentpolisi is the right person to answer your question (I wouldn't know about odesk.com if not for him). PM him for more info.