IPhone 4 tethering alternatives?

Does anyone know an alternative to finding a webapp besides at this site: "http://help.benm.at”?

I've been attempting to use my iPhone 4 for internet connection on my mac, every forum and tutorial I could find with instructions to do this has led me to this site. When I try to go on the site using my iPhone, I'm directed somewhere else. I'm very new to this and just need to tether for a week. Are there any alternatives besides paying for additional coverage?

Tether me from cydia