I've been working on developing a pretty hefty form over the past couple weeks and the users want a lot of data pulled in from various data sources. One request they hadwas to be able to use the Contact Selector control to have the same "People Picker" functionality available to them within SharePoint. Well, that's not a problem, but requests didn't stop there. They also wanted to have certain user information fields auto-populate based upon the person they pick in this People Picker. I hadn't implemented this before.