Awesome,
I'm more interested in a card for an A4000D as an initial purchase although I have a bare A1200 kicking around. For a $300 price tag, well the money has just been earmarked so produce the product and you have a sale :-D
If you do manage to release sometime soonish then I'm sure there will be decent demand, the community is wound like a spring waiting for "any" new hardware to play with and especially the chance for a bit of OS4 love!
Springs wound too much eventually snap so I hope you come through. :-)
