Maybe the answer is now; see comment below. But if nothing else, the same problem and question. I have tried all the unique suggestions made in this and other forums, several times for some suggestions, as the original author did, and I continue to receive the same message. I removed everything from the support portal, from my iPhone (3.1.3) and from Xcode (3.2), and reinstalled / reinstalled everything. As above, the green dot is displayed in the Organizer, as well as the corresponding specific iPhone data, the initialization file is also on the iPhone, all relevant certificates are displayed in place. I “cleaned” the assembly; I unplugged the iPhone and restarted Xcode in several different sequences; I closed the Mac and restarted everything. But, I keep getting "No connected device for iPhone OS."
And yes, this is my first attempt to download the development application on the iPhone, so the author of the original question and I seem to share similar relevant experience and behavior. I continue to hope to return and find the missing step. And, although it took several attempts to do this, and everything looks as if it is correct, it looks like I still forgot something important.
Besides the “reboot” suggestions, did anyone find any strong feelings in the order in which they are done, or something that seems to have become more complicated with Xcode 3.2 or iPhone 3.1.3? I notice that many examples of this question first appeared 18 months ago, then it was silent for a long time, and now many new queries of this kind have appeared.