Well, I am not 100% sure on the color depth here... I got the board today though, and as soon as I get my sync splitter working I'm going to give it a try. I know for a fact it can do 16 bit color depth, at the very least. Also, on the Amiga, the 24 bit requirement is only for AGA modes, so don't get your boxers in a bundle. I'll ask him about it today, since he didn't give me a bunch of technical details, just the board.
Also, looking at the board, this is clearly NOT the kind of DIY kit the average person will be able to assemble, but still quite competitively priced (even fully assembled) if it can do what I think it can. I'd settle for 16 bit color depth. 'Cuz then it'll work with my IIgs and my Neo Geo!
Lastly, once I get a chance to try this baby out, I'll have pictures. Plenty of em!