This caught my attention this morning while I was watching the local news. I have an iPhone and I honestly would never do this. The apps that you download, may have a virus and cause the phone to crash, like a computer.
I am not sure how everyone feels about this, but I am not willing to damage my phone to get an app that I cannot get from iTunes.
http://www.wesh.com/technology/24394450/detail.html
Zimmy