When using this board with an Indie ECS does it provide a "scan doubled" Cirrus GD5434 video output? I think Thomas already stated that would be true but I would like to make sure as I want to order one ASAP. 
I think someone needs a beer!! :roflmao:
Presumably it would work the same as any other Amiga with an Indi + a graphics card would. Native screenmodes are doubled by the Indi (prior to the pass-through), P96 modes are handled exclusively by the graphics card.
I like the concept of this, need some time to look into it a bit further. Currently my Indi output is in one of the slots of my A2000, fed back in through a separate cable into my Spectrum, then back out to my monitor. If this card makes that connection internally it would be a bit cleaner. Hooray for fewer wires on my desk, and all that.

I'll take that beer now! :pint: