Emailing "How to Tether Your Jailbroken iPhone"
Unfortunately, there's still no tethering for the iPhone. Tethering, available for many other smartphones, is a long sort after feature that allows you to use your handset as a modem to connect a notebook computer to the Web. While you can't tether officially, there is a way to do it if you've jailbroken your smartphone to run unofficial software. This
link will lead you to a multi-step process outlined by
MobileCrunch to enable tethering for your iPhone. According to the writer, it isn't difficult, but is time consuming. The first step is to hack your iPhone using the blackra1n jailbreak.