Nice video NovaCoder! Seeing that already answered something I asked too. I wonder why your oscillator is socketed. Testing different clocks or it came late after the sample card arrival maybe?
OS 4.1 for the Classic will be supported, yes. I got a CS-PPC specially for my A4000 at work so now it has to be done 
Good, but is this a promise to code driver suitable for OS3.9 too? Support for both OS3.9 (for gaming) and support for OS4.1 Classic (for some utilty) is needed to enlargen the market. Just like it is done with X-Surf 100.
No, that's the JTAG connector, sorry! If you have a front panel connector which comes out as separate plugs rather than a block, though, you can still connect it that way.
Yes, but F-AUDIO connector is already more common in new computer cases. There are no adapters for F-AUDIO to 3.5. I have searched ebay a lot for this one and ended up ordering some cheap heaset adapter, chopping other end off and soldering 10-pin male pin header to make adapter. This is an adapter AmigaKit should make too and sell it.
I think from memory it's 64KB. It's not a lot.
I have a table somewhere where I have collected how much my Zorro and PCI cards consume. I want to link it here when I find it.
I use a ribbon cable, which just about fits, but yes. Maybe Matthew can comment (I'm only the software guy )
Indivision AGA 4000 MK II has 90 degree flat cable connector. 90 degree connector is not much more expensive, but if using soldering wave machine techology for bottom side solders it has to be guaranteed that the PCB will not "drink" from the solder wave and get solder inside plastic frame, but this is only the concern of electronic factory where you produce them.
I think the board is already screened, but maybe in the next version? Need to ask Matthew.
Silkscreen always increases the price and both sides silkscreened is even more expensive, but it always gives more professional look and useful instruction and the most important componets numbers. ZorRAM is silkscreened so I believe the final version will have AmigaKit texts as usual, so adding some more text costs nothing.
The ZorRAM retails at about £150 from memory - the Prisma should be much less than that.
If it will be cheaper, I'm amazed but won't complain.
An Amiga Zorro graphics card is possible but drivers will be difficult so it won't be cheap. I wouldn't hold your breath on that one.
I'm afraid you should forget about a PPC card for the A3000/A4000 (or A1200 for that matter) - it's not going to happen, as they're just SO complicated. The market is too small for that kind of financial outlay.
Maybe then Zorro graphics card using some old chip that already has basic routines in kernel.
Now that you mention it, I realized one Amiga accessory I would like to have professionally produced: Cyberstorm PPC heatsink and cooler that has same block for both CPUs leveled in a way that 80-120mm fan would cool both. Also maybe on option of attacking a metal cradle to the heatsink to put 120mm cooler over SIMM sockets.
Previously I have used a hinge where a fast PAPST 120mm cooler is attached, but that will not get a surface touch of PPC heating with is lower than 060 heatsing, so PPC CPU will not cool as much as it would with a surface touch fan. See
this.
I'm sure all those who own a very valuable Cyberstorm PPC would like to pay quite much for such a thing. The original PPC heatink and cooler are very weak and unreliable.
