Profile rating application

[eluser]doubleplusgood[/eluser]
Hello,

A new project that I have started requires me to develop a website and iphone application that has similar functionality to the Hot or Not website. A user would be able to create a profile and then users can rate eachothers pictures and therefore creating a top 10 most rate etc.

I was wondering if anyone had developed a similar sort of web application before or knows of any tutorials to create something like this?

Thank you.