I just got my crazy new DisplayPort to Dual-Link DVI adapter in the mail today, 2 months late. I must be one of the first. It's a pretty crazy adapter. 5 feet long with a sizable box on the end, requiring power via a vestigial USB connector. It works fine visually on my 30 inch Cinema HD display, but now my mouse cursor is jumpy. Every few seconds as I drag my mouse, the cursor jumps 5-10 inches, making it hard and frustrating to use. DisplayPort is cute, but it is not my friend.