I need a Magento wizard who has experience with the Magento API-- I need you to help me build a tool to exchange product and sales information between a Magento store and a PHP site.  I'm a PHP developer, but this API is taking up too much of my time so I want to hand it off.

It is important that you have Magento API experience, not just Magento experience-- please address this in your bid*
 
Strong preference to US/UK/Australia-based providers