I am sure that requires a dedicated team if you are looking for quality work, consider outsourcing to OPD companies... What is your budget?
Not sure about your question - you are looking for a developer as well or you want to know the budget/
I am also looking for a developer for an iPhone app. The design is provided, the data xml from a site also. So who could make that for how much?
It will definitely be hard to find one if you don't have a large budget, but take a look on Sitepoint.com/marketplace