[Update January 2011: Note the date on this post, and the fact that it refers to Android version 2.1 specifically. Android 2.2 features Wi-Fi and USB tethering as a standard feature. If you're running that or later this article probably isn't the droid you're looking for.]
Here’s how to connect your HTC Desire (or perhaps any Android phone) to a Mac via a USB cable so that your computer can use the phone’s mobile broadband connection.
In my opinion, this sort of functionality should be built into the operating system, but I’ll save that rant for another day.
This uses the PdaNet for Android app, which costs USD 23.95 (currently on special at USD 18.95 for a limited time). However there’s a free trial which will suit my fellow reviewers in the Telstra HTC Desire Social Review. You can still use the app after the free trial is over, with the limitation that you can’t connect to secure sites.