Convert string date to NSDate

Very quick and simple project. I'll assign it by today and expect completed very quickly (we both know that the task is easy and fast) I have a date string coming from a XML in the following format 2011-11-21T11:00:00 (where T is a fixed char separator between date and time) that means YYYY-MM-DDTHH:MM:SS I just need a function to convert it in NSDate