>If you are a PCIe adapter manufacturer and want to make your product compatible with Express Box 3T, please contact Marketing(at)Magma.com to join our Partner Program or Join our Interest List and let us know that you're a developer.

And how many PCIe card makers have patched their drivers to work with this thing?

So it's a software problem rather than a hardware problem. Fine, maybe it's not a finished solution yet--but Apple hasn't stopped selling Mac Pros yet, either.