WinterBoard 0.9.3210-1 is now available in Cydia featuring iOS 4.0 support. Using Winterboard you can customize the UI and personalize your iPhone, iPod Touch on iOS 4.
Update: Saurik has pushed another Winterboard which makes Winterboard 100% iOS 4 compatible
We have a detailed guide on how to install and use Winterboard to customize your iPhone and iPod Touch:
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