Which SystemConfiguration.framework did you add? The first line clearly stated
warning: in
/Users/interdev/iphone source code/Web Browser/Classes/SystemConfiguration.framework/SystemConfiguration, missing required architecture i386 in file
But you should add the SDK one, in /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk/System/Library/Frameworks.
The framework should be added by “Add Existing Framework…” in the right-click menu on the project.