iskortch,
I too, moved from the Samsung Captivate to the HTC Inspire 4G. The Inspire does not sync to the AT&T address book as far as I can see. I turned on the bluetooth on the Captivate and the Inspire, turned the Captivates bluetooth to discover mode (make it visible to other devices) and used the transfer app built into Inspire to transfer all my contact info from Captivate to Inspire. It worked perfectly transferring all my contacts (237 contacts)