Cool. What are the specs of your build. I'm also interested in building one.
Just put this on the Steambox I built the other night. Glorious UI, streamlined and unfussy. The box I built is a dream, totally cool and very quiet under load and idle. Almost a non-starter when the card I bought, and generally recommend at the mo, didn't fit thanks to a huge heat pipe on the side of it! A removable bit of the case meant that I just managed to work it.
All in all, awesome. Like owning a new console.