It was possible to skip provisioning to use Xcode's Build & Go with SDK <= 2.2.1 on a jailbroken device without having to pay the 99$ fee. A self-signed certificate and some other minor modifications did the trick (you know what I'm talking about). I can't get that running with Xcode 3.1.3 from the SDK 3.0, probably due to the fact that apple changed the provisioning management. (see SDK 3.0 readme: "Organizer: the iPhone Development grouping now collects crash logs, install bundles, and provisioning profiles in a single location") It doesn't matter if I'm using 2.2.1 or 3.0 as active SDK. Did anyone by chance solve this problem already?