$2 Tether App in the App Store (GET IT NOW)

http://itunes.apple.com/us/app/discorecorder/id545663499?mt=8&ign-mpt=uo%3D4

^Link to the app

http://gizmodo.com/5933856/download-this-iphone-tethering-app-before-it-gets-pulled-from-the-app-store

I can confirm it works.