Loved Headshot. Thought the Ringify app was good too.
I'm actually working on an app for a travel/holiday company with some features strikingly similar to breadcrumbs. In my case though, most of the information is coming from trusted sources and WinPhone app will be for discovery of items, comments etc.
Thought about the potential misuse and spamming so I have a rudimentary filter at the moment that takes out contact information such as email address and phone numbers when user's submit their feedback.
Pictionary is a good idea, and I like the fact that a high school kid did it. When I was in high school there was no competition for developers, so I was just a geek who did weird stuff with computers when others were playing games. I think it was amazing that she went ahead and did this app even though as she said there was some things she didn't understand when she started working on the app.
Great stuff all round though.