Hey Ed,
With all the published bits on UDMA7 not working in the Hasselblads, and my existing cards not working (ADATA, Delkin, Transcend), I'm hesitant to go beyond the initial package opening (cardboard) since the plastic is still sealed. I'll see if someone has an open box and give it a go, but it's interesting to hear they're working for someone else. Can you pm or post an image of the card you're using?
Thanks!
-Joe