If you use the WW version, namely the socket with the pins that protrude about 0.430" below the component side of the board, you can stack 'em five or six levels high without any appreciable loss in signal quality, provided you terminate at the top and bottom of the stack. I use 74S1053 clamp arrays to do limit overshoot, and I often like to ac-terminate fast signals through a resistor to a small cap to common in order to reduce ringing. With this connector, it works VERY well.

I'm a frequent user of wire-wrap for onesies, and I do a lot of them. I've had very good luck with it, much better than with short-run-short-budget PCB's here in the US, where price is high, and quality is low and unpredictable. I can produce a circuit that's quite complex in less time than it would take to lay out a circuit board, and modifications are trivial, not to mention invisible. Wire wrap is questioned by some as being useable for analog circuitry, and I've frequently point-to-point soldered analog portions of my many onesies, but I have also wire-wrapped them in clearly non-critical cases, with good results. If you're curious enough to look at a wire-wrap board, not a circuit, but just a board, I'll happily send you a picture. Most of the wire-wrap boards I've purchased have been utterly pitiful, but I've been able to get really decent results with the ones I've had built to my spec's.

I'm pleased with how well the DIN 41612 connector works in this mode, but it's not necessary that you wire-wrap in order to make it work. However, if you do use a row of pins on the connector for purposes of communicating between boards on the stack, and they don't have to be adjacent, but they should be terminated, you can wire-wrap them and get very satisfactory results without any special accomodation for the height of the wrap.

RE