Comment What's wrong with good old TRS plugs? (Score 3, Interesting) 408
Tip-{ring,ring,...}-Sleeve. Easily handles the 3 or 4 connectors needs for just about any modern digital serial connector. Need power? why not modulate the signal on top of the power carrier? Easy to connect, proven reliable (can't count how many times I've broken a mini/micro USB or worse those umpteen pin pico/nano pin connectors that are only used for power or maybe a simple serial connection)