Chpwn has announced the release of Infinidock version 1.7.6-1. This new updated version of Infinidock comes with support for iOS 4.3.1. For your kind information Infinidock is a jailbreak tweak which allows you to customize the dock of your iPhone. Using this tweak you can place as many apps in the dock of your iPhone and you can scroll horizontally on dock to access them. After you have installed this tweak on your iPhone, a toggle will be added to Settings app of your iPhone where you can define the view size and whether you want scrolling or not.
You should note that you will need to have a jailbroken iPhone to install this tweak. If you don’t have jailbroken iPhone then you can follow the steps posted here to jailbreak your iPhone on iOS 4.2.1 with redsnow. You can download Infinidock from Cydia via BigBoss repo. It costs $0.99 USD.