Actually, I can answer one thing right now:
Puma and DFH are long dead. The designer of Puma had and likely has no clue at all. He then abandoned the community leaving a mess for others to clean up.
RavAGE is as yet just a schematic, though a very good one, at that. Don't hold your breath for a RavAGE based board. It'll come eventually, and be awesome, but who knows when.
Jaguar exists, and is in use, on lots of cars, right now. It's a GPL board design, with a jumper wire approach, and no connector. Ideal for dropping into an OEM case and wiring to an OEM connector. Feeler for the next jag spin is here, links to old thread within, old thread has pics:
http://forum.diyefi.org/viewtopic.php?f=27&t=2176
About number of outputs... There are just 6 for now. They are shared between ign and inj in whatever way you want. Later I hope it will have 36 channels, enough for a staged injection setup on a V12. But not yet, and not for a while. Read this for info:
http://forum.diyefi.org/viewtopic.php?f=54&t=1084
For use with the dev boards like the TA card and the one linked up above, there is this board by a Finnish guy:
http://roller.baboonplanet.com/garage/e ... e_cards12x
I hope that helps!
Fred.