What you find in commercial buildings are way cooler and more modern-looking than for homes, but I imagine they are NOT cheap.

http://www.constructionwork.com/products_registers_grilles_and_diffusers.html

Good listing of various companies.

Hey Greg,
i justed wanted to compliment you on your endless supply of knowledge and resources! You are an amazing filing cabinet of some of the coolest stuff, how do you keep track of all of this. I am really knocked out by the registers from Seiho you recommended, very cool stuff. I have a very low ceiling in my house and was told it would be a bear to run ducts through it, but on a recent episode of TOH they showcased some high velocity ducting, it's smaller then normal and I think it would be great with these techy registers. thanks again.

Franco

http://www.francovogt.com

How do I do it? My brain is full.

Those high velocity systems usually have their own registers that are pretty discrete. The Seihos are great for eliminating ductwork because they will long-throw the air across a room. You don't need to run the ducts everywhere because you can shoot the air to a far wall. Great for airconditioning, but can feel drafty with heat.