Wanna get Jiggy? First, your have to Jailbreak your iPhone. If you don't know what that means and understand the consequences, you might not want to go any further. But, if you are part of the majority of iPhone users that have found their way to a better iPhone, you have two choices:
You can do it the full-geek way by downloading the zip files here and here and installing it manually. Or,
You can do it the Easy Cheese way and add the Jiggy repository to Installer. Just launch Installer, click on the “Sources” button, click on “Edit” at the top right and then “Add”. Enter the following URL
http://jiggyapp.com/i
Then, hit “OK”. Once the sources are refreshed you will see two new packages under the “Development” category. First, install the one called Jiggy Runtime and then install Jiggy.
Jiggy was developed on iPhones with firmware version 1.1.1 and 1.1.2. It was also tested on an iPod Touch with 1.1.2.