I love soundBlade, but you're prolly gonna have to keep waiting. Just because they have an 8 channel interface, doesn't mean the app is 8 channel yet (not over here anyway!). So, almost...
On the other hand, the hardware is absolutely amazing. The best interface I've ever used, period. Mine's custom from MH with a few goodies, but the same guts as Sonics. The DACs are jaw droppers: its as if a whole new octave has been discovered on the bottom. I've never heard bass so accurate, rich and clear in my life, and the top is effortlessly smooth.
I no longer use my PT interfeces for anything but getting in/out of PT, and we'll be replacing the HDIO ADs and DAs in our A room with a couple of these things as soon as possible, because they just smoke the Digi interfaces (which don't suck at all). It's like having all the benefits of DSD with none of the bs. I highly recommend you try them out... they're miles ahead of old Sonic Solutions hardware (which was well built, but over-priced and under-performing) sonically and functionally.
-d-