Apple has decided to remove Netshare from the apps store stating they would no longer allow any kind of tethering through the iPhone. Netshare allows you to use a PC or Mac and use the iPhone's internet connection for your web browsing needs. You can get the app right here. Below are instructions for installing on a Mac. Click here for instructions to install on Visa PC.
Download Netshare 1.0
Password: www.ritpak.com