I thought I would share this, as I finally got around to taking pics and documenting it. I completed this build in mid 2013. It started out as a mix of old and new, as I had some spare parts laying around that I wanted to put to use. It then turned into a pretty in depth build, as I wanted this little box to be an all in one solution for my living room. It has definitely worked out for me!
The hardware breakdown is right here, but the crowning achievement of this build, in my opinion, is on the software side. I'm utilizing XBMC as the front end for just about everything, with advance launcher settings to get to Steam (Big Picture view FTW), PowerDVD for blu-rays, netflix, etc. This is all tied in extremely nicely with my Logitech harmony remote. I also have 2 dual tuner HDTV tuners for OTA reception, with a NextPVR backend that is seamless with XBMC. Free DVR! It also works great as a whole home DVR for my other PCs that have XBMC installed.
I am very proud of this build. Many hours of blood, sweat and tears have been poured into this. Here are some pictures of the completed build, and here are some pictures of my entertainment center putting it to use, which is next to my Gaming PC as well!