The most unique product I saw presented at CEDIA 2007 was the incredible Sony HES-V1000. This device, shown in this photo, looks like a large PC tower. However, within its cabinet there is a 500GB hard drive, a 200 Disc Blu-ray/DVD/CD Changer (with both read and write capability for Blu-ray discs and DVDs), and complete networking capability, all which serve to create a very practical home media server, provided you can afford its $3,500 price tag.
For more details, check out Sony's HES-V1000 Official Announcement.