For my own use I've built a PK70 blade board with the following:
16 Channels of 12 bit A/D using 2 of the MAX197 A/D
4 optically isolated power switches the switches are rated to 30V 6A,
but the trace size and connector pin capacity would likely limit this to 1A
8 non isolated Digtal I/O channels.
8 RC servo drives, to drive a standard RC servo.
All of this comes out on a 62 pin HD DB connector. (Same size as DB37) and fits in a aPK70 as a standard blade board.
The cost would likely be a bit more than the multiblade board as the MAX197 is the most expensive component of that board and the 62 pin DB connector is also more expensive.
Should we offer this as a product?
Paul