DarkSable :
Wait, so this is a BTX form factor case? AWESOME!
Not so much.
BTX not only has to do with the 'backward' mounting, but also has a lot to do with the board layout, as well as the mounting points on the motherboard tray.
The biggest thing about BTX is the focus on cooling. This was back in the day of the old hot Pentium 4 processors, and manufacturers were having serious issues with cooling things while staying under a specific dB envelope. So BTX came out which put the processor, NB, SB, sometimes feature chips, and the primary graphics slot all in a single line so that you could have 2 large fans in a push-pull configuration with as little obstruction as possible, and remove the need for specific CPU, northbridge, and GPU fans. RAM, while not in direct flow of this 'wind tunnel', was also mounted in a front-to-back configuration above the CPU and NB/SB chips rather than the normal ATX configuration which has RAM in a top-to-bottom orientation which breaks airflow.
While backward mounted, the IO was still on the top of the case, rather than the bottom like a backward ATX setup.
I loved the BTX standard, but it never really caught on for consumer use. Dell is the only manufacturer to really use BTX on a lot of equipment, but HP has used (or at least borrowed from) the layout on some things as well. Apple desktops (cheese-grater Power Macs) also borrowed a lot of things from the design philosophy, but still quite different in that they put all of the rear IO on headders which connects to the front of the board, and then they cram all of the CPU and GPU resources next to eachother more like a traditional ATX layout, while most of the rest of the layout follows BTX design.
As it stands now, I don't think you can get a consumer BTX motherboard that will run anything faster than a late gen Pentium 4, or perhaps an early Core2Duo because the format died out when die shrinks finally made things run cooler, and extreme cooling methods were no longer a necessity.
At any rate, this looks like a great case. Very glad to see high end gamer cases finally growing up a bit and looking cleaner and more professional rather than an odd hodge-podge of rectangles slapped together. Only question I have is why did they design a high end case with the PSU mount on top?